Socioeconomic Status and Academic Achievement: A Meta-Analytic Review of Research
Socioeconomic Status and Academic Achievement: A Meta-Analytic Review of Research
Socioeconomic Status and Academic Achievement: A Meta-Analytic Review of Research
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Selcuk R. Sirin
New York University
Socioeconomic status (SES) is probably the most widely used contextual vari-
able in education research. Increasingly, researchers examine educational
processes, including academic achievement, in relation to socioeconomic back-
ground (Bornstein & Bradley, 2003; Brooks-Gunn & Duncan, 1997; Coleman,
1988; McLoyd, 1998). White (1982) carried out the first meta-analytic study that
reviewed the literature on this subject by focusing on studies published before 1980
examining the relation between SES and academic achievement and showed that
the relation varies significantly with a number of factors such as the types of SES
and academic achievement measures. Since the publication of White’s meta-
analysis, a large number of new empirical studies have explored the same relation.
The new results are inconsistent: They range from a strong relation (e.g., Lamdin,
1996; Sutton & Soderstrom, 1999) to no significant correlation at all (e.g., Ripple
& Luthar, 2000; Seyfried, 1998). Apart from a few narrative reviews that are
mostly exclusive to a particular field (e.g., Entwisle & Astone, 1994; Haveman &
Wolfe, 1994; McLoyd, 1998; Wang, Haertal, & Walberg, 1993), there has been no
systematic review of these empirical research findings. The present meta-analysis
is an attempt to provide such a review by examining studies published between
1990 and 2000.
McLoyd (1998), in her review of recent research on SES and child develop-
ment, and Entwisle and Astone (1994), in their review of SES measures, identified
a number of major factors that differentiate the research published during the 1960s
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and the 1970s from that published in recent years. The first of these is the change
in the way that researchers operationalize SES. Current research is more likely to
use a diverse array of SES indicators, such as family income, the mother’s educa-
tion, and a measure of family structure, rather than looking solely at the father’s
education and/or occupation.
The second factor is societal change in the United States, specifically in parental
education and family structure. During the 1990s, parental education changed
dramatically in a favorable direction: Children in 2000 were living with better-
educated parents than children in 1980 (U.S. Department of Education, 2000).
Likewise, reductions in family size were also dramatic; only about 48% of 15-to-
18-year-old children lived in families with at most one sibling in 1970, as
compared with 73% in 1990 (Grissmer, Kirby, Berends, & Williamson, 1994).
A third factor is researchers’ focus on moderating factors that could influence
the robust relation between SES and academic achievement (McLoyd, 1998). With
increased attention to contextual variables such as race/ethnicity, neighborhood
characteristics, and students’ grade level, current research provides a wide range
of information about the processes by which SES effects occur.
Thus, because of the social, economic and methodological changes that have
occurred since the publication of White’s (1982) review, it is difficult to estimate
the current state of the relation between SES and academic achievement. This
review was designed to examine the relation between students’ socioeconomic sta-
tus and their academic achievement by reviewing studies published between 1990
and 2000. More specifically, the goals of this review are (a) to determine the mag-
nitude of the relation between SES and academic achievement; (b) to assess the
extent to which this relation is influenced by various methodological characteris-
tics (e.g., the type of SES or academic achievement measure), and student charac-
teristics (e.g., grade level, ethnicity, and school location); and (c) to replicate
White’s meta-analysis with data from recently published studies.
Measuring Socioeconomic Status
Although SES has been at the core of a very active field of research, there seems
to be an ongoing dispute about its conceptual meaning and empirical measurement
in studies conducted with children and adolescents (Bornstein & Bradley, 2003).
As White pointed out in 1982, SES is assessed by a variety of different combina-
tions of variables, which has created an ambiguity in interpreting research findings.
The same argument could be made today. Many researchers use SES and social
class interchangeably, without any rationale or clarification, to refer to social and
economic characteristics of students (Ensminger & Fothergill, 2003). In general
terms, however, SES describes an individual’s or a family’s ranking on a hierar-
chy according to access to or control over some combination of valued commodi-
ties such as wealth, power, and social status (Mueller & Parcel, 1981).
While there is disagreement about the conceptual meaning of SES, there seems
to be an agreement on Duncan, Featherman, and Duncan’s (1972) definition of the
tripartite nature of SES that incorporates parental income, parental education, and
parental occupation as the three main indicators of SES (Gottfried, 1985; Hauser,
1994; Mueller & Parcel, 1981). Many empirical studies examining the relations
among these components found moderate correlations, but more important, these
studies showed that the components of SES are unique and that each one measures
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Student Characteristics
Socioeconomic status is not only directly linked to academic achievement but
also indirectly linked to it through multiple interacting systems, including students’
racial and ethnic background, grade level, and school/neighborhood location
(Brooks-Gunn & Duncan, 1997; Bronfenbrenner & Morris, 1998; Eccles, Lord, &
Midgley, 1991; Lerner 1991). For example, family SES, which will largely deter-
mine the location of the child’s neighborhood and school, not only directly
provides home resources but also indirectly provides “social capital,” that is, sup-
portive relationships among structural forces and individuals (i.e., parent–school
collaborations) that promote the sharing of societal norms and values, which are
necessary to success in school (Coleman, 1988; Dika & Singh, 2002). Thus, in
addition to the aforementioned methodological factors that likely influence the
relation between SES and academic achievement, several student characteristics
also are likely to influence that relation.
Grade Level
The effect of social and economic circumstances on academic achievement may
vary by students’ grade level (Duncan, Brooks-Gunn, & Klebenov, 1994; Lerner,
1991). However, the results from prior studies about the effect of grade or age on the
relation between SES and academic achievement are mixed. On the one hand, Cole-
man et al.’s (1966) study and White’s (1982) review showed that as students become
older, the correlation between SES and school achievement diminishes. White pro-
vided two possible explanations for the diminishing SES effect on academic achieve-
ment. First, schools provide equalizing experiences, and thus the longer students stay
in the schooling process, the more the impact of family SES on student achievement
is diminished. Second, more students from lower-SES backgrounds drop out of
school, thus reducing the magnitude of the correlation. On the other hand, results
from longitudinal studies have contradicted White’s results, by demonstrating that
the gap between low- and high-SES students is most likely to remain the same as stu-
dents get older (Duncan et al., 1994; Walker, Greenwood, Hart, & Carta, 1994), if
not widen (Pungello, Kupersmidt, Burchinal, & Patterson, 1996).
Minority Status
Racial and cultural background continues to be a critical factor in academic
achievement in the United States. Recent surveys conducted by the National Cen-
ter for Education Statistics (NCES) indicated that, on average, minority students
lagged behind their White peers in terms of academic achievement (U.S. Depart-
ment of Education, 2000). A number of factors have been suggested to explain the
lower academic achievement of minority students, but the research indicates three
main factors: Minorities are more likely to live in low-income households or in sin-
gle parent families; their parents are likely to have less education; and they often
attend under-funded schools. All of these factors are components of SES and
linked to academic achievement (National Commission on Children, 1991).
School Location
The location of schools is closely related to the social and economic conditions
of students. A narrative review of research on school location (U.S. Department of
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Methods
Criteria for Including Studies
To be included in this review, a study had to do the following:
1. Apply a measure of SES and academic achievement.
2. Report quantitative data in sufficient statistical detail for calculation of
correlations between SES and academic achievement.
3. Include in its sample students from grades kindergarten through 12.
4. Be published in a professional journal between 1990 and 2000.
5. Include in its sample students in the United States.
Identification of Studies
Several computer searches and manual searches were employed to gather the
best possible pool of studies to represent the large number of existing studies on
SES and academic achievement. The computerized search was conducted using
the ERIC (Education Resources Information Center), PsycINFO, and Sociolog-
ical Abstracts reference databases. For SES, the search terms socioeconomic
status, socio-economic status, social class, social status, income, disadvantaged,
and poverty were used. For academic achievement the terms achievement,
success, and performance were used. The search function was created by using
two Boolean operators: “OR” was used within the SES set and the academic
achievement set of search terms, and “AND” was used between the two sets.
Because the majority of studies used SES as a secondary or control variable and,
therefore, the computerized databases did not always index them by using one
of the above search terms as a keyword, the search was performed by using the
“anywhere” function, not the “keyword” function. All databases were searched
for the period 1990 to 2000 (on November 24, 2001). The search yielded 1,338
PsycINFO documents, 953 ERIC documents, and 426 Sociological Abstracts
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documents. After double entries were eliminated, there remained 2,014 unique
documents.
Next, the Social Science Citation Index (SSCI) was searched for the studies that
cited either Coleman et al.’s (1966) or White’s (1982) review, or both, because
both of those publications have been highly cited in the literature on SES and aca-
demic achievement. Through this process, an additional 170 articles that refer-
enced White’s study and 266 articles that referenced Coleman’s report were
identified. In addition, I received 27 leads from previous narrative reviews and
from studies that had been identified through the initial search. In total, the final
pool contained 2,477 unique documents.
After the initial examination of the abstracts of each study, I applied the inclu-
sion criteria to select 201 articles for further examination. I made the final deci-
sions for inclusion after examining the full articles. Through this process, I selected
58 published journal articles that satisfied the inclusion criteria.
Coding Procedure
A formal coding form was developed for the current meta-analysis on the basis
of Stock et al.’s (1982) categories, which address both substantive and methodolog-
ical characteristics: Report Identification, Setting, Subjects, Methodology, Treat-
ment, Process, and Effect Size. To further refine the coding scheme, a subsample of
the data (k = 10) was coded independently by two doctoral candidates. Rater agree-
ment for the two coders was between .80 and 1.00 with a mean of 87%. The coders
subsequently met to compare their results and discuss any discrepancies between
their ratings until they reached an agreement upon a final score. The coding form
was further refined on the basis of the results from this initial coding procedure. The
final coding form included the following components:
1. The Identification section codes basic study identifiers, such as the year of
publication and the names and disciplines of the authors.
2. The School Setting section describes the schools in terms of location from
which the data were gathered.
3. The Student Characteristics section codes demographic information about
study participants including grade, age, gender, and race/ethnicity.
4. The Methodology section gathers information about the research methodol-
ogy used in the study, including the design, statistical techniques, as well as
sampling procedures.
5. The SES and Academic Achievement section records data about SES and aca-
demic achievement measures.
6. The Effect Size (ES) section codes the statistics that are needed to calculate
an effect size, such as correlation coefficients, means, standard deviations, t
tests, F ratios, chi-squares, and degrees of freedom on outcome measures
used in the study.
Interrater Agreement
All studies were coded by the author. A doctoral student who helped design the
coding schema coded an additional random sample of 10 studies. Interrater agree-
ment levels for the six coding categories ranged from 89% for the methodology
section to 100% for the names of the coding form.
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Analytical Procedures
Calculating Average Effect Sizes
The effect size (ES) used in this review was Pearson’s correlation coefficient r.
Because most results were reported as a correlation (k = 45), the raw correlation
coefficient was entered as the ES measure. There were 8 studies that did not orig-
inally report correlations but provided enough information to calculate correlations
using the formulas taken from Hedges and Olkin (1985), Rosenthal (1991), and
Wolf (1986) to convert the study statistic to r. Correlations oversestimate the pop-
ulation effect size because they are bounded at –1 or 1. As the correlation coeffi-
cients approach –1 or 1, the distribution becomes more skewed. To address this
problem, the correlations were converted into Fisher’s Z score and weighted by the
inverse of the variance to give greater weight to larger samples than smaller sam-
ples (Lipsey & Wilson, 2001). The average ESs were then obtained through a
z-to-r transformation with confidence intervals to indicate the range within which
the population mean was likely to fall in the observed data (Hedges & Olkin). The
confidence interval for a mean ES is based on the standard error of the mean and a
critical value from the z distribution (e.g., 1.96 for α = .05).
Statistical Independence
There are two main alternative choices for the unit of analysis in meta-analysis
(Glass, McGaw, & Smith, 1981). The first alternative is to use each study as the unit of
analysis. The second approach is to treat each correlation as the unit of analysis. Both
of these approaches have shortcomings. The former approach obscures legitimate dif-
ferences across multiple correlations (i.e., the correlation for minority students versus
the correlation for White students), while the latter approach gives too much weight to
those studies that have multiple correlations (Lipsey & Wilson, 2001). A third alterna-
tive, which was chosen for this study, is to use “a shifting unit of analysis” (Cooper,
1998). This approach retains most of the information from each study while avoiding
any violations of statistical independence. According to this procedure, the average
effect size was calculated by using the first alternative; that is, one correlation was
selected from each independent sample. The same procedure was followed when the
focus of analysis was a student characteristic (e.g., minority status, grade level, or
school location). For example, if a study provided one correlation for White students
and another for Black students, the two were included as independent correlations in
the same analysis. The only exception to this rule was the moderation tests for the
methodological characteristic (e.g., the types of SES or academic achievement mea-
sure). For example, if a study provided one correlation based on parental education and
another based on parental occupation, they were both entered only when the modera-
tor analysis was for the type of SES measure. In both alternatives, there was only one
correlation from each study for each construct. When studies provided multiple corre-
lations for each subsample, or multiple correlations for each construct, they were aver-
aged so that the sample on which they were based contributed only one correlation to
any given analysis. Thus, in Tables 1 (page 424) and 2 (page 429), the correlation for
each study is the average correlation (r) for all constructs for that specific sample.
424
Summary of the independent samples
Author(s) Grade/ Ethnicity School SES Achievement N of students
3179-04_Sirin.qxd
(publication year) school level (or % minority) location measure measure (or N of schools) r
Alexander, Entwisle, Primary 60 Baltimore FRLa GPA 453 .391
& Bedinger (1994); schools Education Achievement Test 489
9/2/05
Entwisle, Alexander,
& Olson (1994)
Alspaugh (1991); Primary N/A Urban/rural % FRL Missouri Mastery Urban school Urban =
Alspaugh (1992) Achievement Test N = 39 .719
2:07 PM
Dixon-Floyd & Grades 6–8 75 El Paso, TX, FRL Texas Assessment 85 .467
Johnson (1997) school districts for Academic
Scores
Dornbusch, Ritter, High school Black and Suburban Educationa Self-reported W = 3,533 WF = .32
9/2/05
four-factor
Gonzales, Cauce, Grades 7–8 Black Urban Education a GPA 120 .130c
Friedman, & Income
Mason (1996) Neighborhood
Greenberg, Langau, Grade 1 47 Nationwide Education a Woodcock-Johnson 337 .249
Coie, & multi-state Occupation Psycho-
Pinderhughes longitudinal Home Educational
(1999) study Neighborhood Battery–
Revised
Griffith (1997) Grades 3–6 38 Suburban % FRL Criterion School .650
school Referenced N = 119
district Test
Grolnick & Grades 6–8 2 N/A Education GPA 302 .095
Slowiaczek
(1994)
(continued)
425
TABLE 1 (Continued )
426
Author(s) Grade/ Ethnicity School SES Achievement N of students
(publication year) school level (or % minority) location measure measure (or N of schools) r
3179-04_Sirin.qxd
McGauvran,
1974)
Jimerson, Grade 1 36 Urban Duncan’s SEIb Achievement 143 .300
Egeland, Education Test
2:07 PM
Vaden (1990);
Pungello,
Kupersmidt,
Burchinal, &
2:07 PM
Patterson (1996)
Rech & Stevens Grade 4 Black Urban FRL CAT 133 .060
(1996)
Ripple & Luthar Grade 9 85 Urban Hollingshead GPA 96 .010c
(2000). two-factor
Page 427
Schultz (1993) Grades 4–6 Black and Urban FRL BASIS 133 .430
Hispanic
Seyfried (1998) Grades 4–6 96 Suburban near Educationb GPA 113 .005
large Income MAT
Midwest
city
Shaver & Walls Grades 7–8 6 Marion FRL CTBS 335 .166
(1998) County, WV
Strassburger, Grades 7–9 19 N/A Occupation GPA 357 .080
Rosen, Miller,
& Chavez (1990)
Sutton & Soderstrom Grades 3 27 Mixed FRL Achievement School .750c
(1999) and 10 Test N = 2,307
Thompson et al. Mixed N/A N/A Hollingshead Achievement 76 .555
(1992) two-factor Test
(1957)
(continued)
427
TABLE 1 (Continued)
428
Author(s) Grade/ Ethnicity School SES Achievement N of students
(publication year) school level (or % minority) location measure measure (or N of schools) r
3179-04_Sirin.qxd
Trusty, Watts, & Grades 4–6 Black Rural Education b Stanford F = 265 F = .150
House (1995) FRL Achievement M = 298 M = .210
Test
9/2/05
Trusty, Watts, & Grades 7–8 Black Rural Educationb Stanford F = 157 F = .200
Lim (1996) FRL Achievement M = 129 M = .260
Test
Trusty, Peck, & Grade 4 55 Mixed Educationb Stanford 392 .440
2:07 PM
Note. r = effect size; N/A = information not available; K-ABC = Kaufman Assessment Battery for Children; FRL = free or reduced-price lunch;
W = White; B = Black; SEI = Socioeconomic Index; PIAT = Peabody Individual Achievement Test; PIAT-R = Peabody Individual Achievement
Test–Revised; F = female; M = male; CAT = California Achievement Test; WRAT = Wide Range Achievement Test; SRA = Science Research
Associates; BASIS = Basic Achievement Skills Individual Screener; WRAT-R = Wide Range Achievement Test–Revised; MAT = Metropoli-
tan Achievement Test; CTBS = Comprehensive Test of Basic Skills.
aThis study reported independent results per SES component. b This study combined these components in its SES measure. cOnly the first wave of
National Educational Kennedy (1995) for NELS Grade 8 Asian Educationa GPA AF = 741 AF = .190
Longitudinal base year; Levine & American Occupation AM = 785 AM = .240
Study: 88/90/94 Painter (1999) for Income
multiple SES Black Educationa GPA BF = 1,538 BF = .280
9/2/05
Note. ESr = effect size r; A = Asian American; B = Black; H = Hispanic American; W = White; F = Female; M = Male; PIAT = Peabody Individual Achievement
429
Test; NEAP = National Educational Assessments of Student Progress.
a
This study combined multiple SES components in the SES measure. b Only the first wave of data was used to calculate ES from this longitudinal study. c This study
reported separate results for each SES component.
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A fixed effects model allows for generalizations to the study sample, while the ran-
dom effects model allows for generalizations to a larger population. For the pres-
ent review, both fixed and random methods results are provided for the main effect
size analysis. For the moderator analyses, fixed methods were chosen to make
inferences only about the studies reviewed in this meta-analysis.
Test of Homogeneity
The variation among correlations was analyzed using Hedges’s Q test of homo-
geneity (Hedges & Olkin, 1985). This test uses the chi-square statistic, with the
degree of freedom of k − 1, where k is the number of correlations in the analysis.
If the test reveals a nonsignificant result, then the correlations are homogenous and
the average correlation can be said to represent the population correlation. If the
test reveals a significant result, that is, if the correlations are heterogeneous, than
further analyses should be carried out to determine the influence of moderator vari-
ables on the relation between SES and academic achievement.
Publication Bias
It is well documented in meta-analysis literature that there is a publication bias
against the null hypothesis (Lipsey & Wilson, 2001; Rosenthal, 1979). We used two
methods to evaluate publication bias in the current review. First, publication bias in
this review would be minimal partly because the SES–achievement relation was not
the primary hypothesis for most studies, as the bias toward significant results is likely
to be contained within the primary hypothesis (Cooper, 1998). To empirically test
this assumption, we determined whether the SES–achievement relation was one of
the main questions in each study by checking the title, abstract, introduction, research
questions and/or hypotheses. Of the 58 articles included in the review, 24 articles had
the SES–achievement relation as one of the main questions (i.e., central variable) of
the study. The remaining 34 articles did not have the SES–achievement relation as a
central variable, but instead used it as a control variable. To examine the possibility
of bias, articles in which the SES achievement relation was a main question were
treated as the central group, and articles in which the relation was a control variable
were treated as a control group. On the basis of the student-level data (N = 64), there
430
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26
76
113
129
143
173
213
270
Sample size
292
302
371
398
440
538
696
1028
1467
1686
2535
8166
21263
-.2 0.0 .2 .4 .6 .8
ESZ
FIGURE 1. Funnel plot is used to visually inspect data for publication bias. The sym-
metrical inverted funnel shape suggests that there is no publication bias. The only
exception to the symmetry appears to be from two large sample studies that used
home resources as a measure of SES.
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Results
The results are presented in three subsections. First, to address the first ques-
tion, the magnitude of the relation between SES and academic achievement, we
reported general findings of the review. To address the second question, testing for
the effects of methodological and student characteristics, we reported the results
of the moderator tests. Finally, to compare our findings with that of White’s (1982)
review, we reported results from another set of analyses that was conducted using
White’s procedures.
General Characteristics of the Studies
Table 1 contains information about the studies used in this analysis and the vari-
ables for which they were coded. There were 75 independent samples from 58 pub-
lished journal articles. Summary of nationwide studies, including data from the
National Educational Longitudinal Study, the National Longitudinal Study of
Youth, and the Longitudinal Study of American Youth are presented in Table 2.
Of 75 samples, 64 used students as the unit of analysis, while 11 used aggregated
units of analyses (i.e., schools or school districts). The total student-level data
included 101,157 individual students. The sample sizes for this group ranged from
26 to 21,263, with a mean of 1,580.58 (SD = 3,726.32) and a median of 367.5. The
aggregated level data included 6,871 schools and 128 school districts.
Although the publication years of the studies were limited to the period of
1990–2000, the actual year of data collection varied from 1982 to 2000.The data
collection year was reported in most of the articles (k = 36). The year 1990 had the
largest number of studies (k = 7) followed by 1988 and 1992 with 6 studies each.
A weighted regression analysis revealed no statistically significant association
between publication year and the effect sizes, β = −.03, n.s.
TABLE 3
Methodological characteristics moderators of the relationship between SES
and academic achievement
Q- Mean −95% +95%
Moderator Categories k between ES CI CI
Type of SES 79 587.14* .32 .32 .33
components
Education 30 .30 .30 .31
Occupation 15 .28 .26 .29
Income 14 .29 .27 .31
Free or reduced- 10 .33 .32 .34
price lunch
Neighborhood 6 .25 .22 .28
Home 4 .51 .49 .53
SES range 102 238.65* .32 .32 .33
restriction
No restriction 78 .35 .35 .36
3 to 7 SES groups 15 .28 .28 .29
2 SES groups only 9 .24 .22 .27
SES data source 62 775.55* .29 .28 .30
Parents 31 .38 .37 .39
Students 18 .19 .19 .20
Secondary sources 13 .24 .21 .26
Achievement 167 884.21* .29 .28 .29
measures
General 45 .22 .22 .23
achievement
Verbal 58 .32 .32 .33
Math 57 .35 .34 .36
Science 7 .27 .27 .29
Note. k = number of effect sizes; ES = effect size; CI = confidence interval for the average
value of ES.
*p < .005.
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TABLE 4
Student characteristics moderators of the relationship between SES and academic
performance
Moderator Q- Mean −95% +95%
variable Categories k between ES CI CI
Grade level 71 162.23** .28 .28 .29
Kindergarten 9 .19 .16 .22
Elementary school 21 .27 .25 .30
Middle school 19 .31 .31 .32
High school 22 .26 .26 .27
Minority status 35 164.86** .24 .23 .25
White students 11 .27 .25 .28
Minority students 24 .17 .16 .19
School location 26 10.15* .25 .23 .27
Suburban 9 .28 .25 .30
Urban 13 .24 .22 .27
Rural 4 .17 .12 .23
Note: k = number of effect sizes; ES = effect size; CI = confidence interval for the average
value of ES.
*p < .005. ** p < .001.
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Grade Level
The sample used for this analysis had 71 correlations, which included the orig-
inal 64 student-level correlations and 7 additional correlations that came from the
longitudinal studies that provided multiple correlations for the same students over
time. Because some studies presented data from multiple grades without further
specification, the grade data were coded as Kindergarten (1), Elementary School
(2), Middle School (3) and High School (4).
Student’s grade level was found to be a significant moderator of the correlations
between SES and academic achievement, Qb(3, 70) = 162.23, p < .001. As pre-
sented in Table 4, the mean ES was .19 for the kindergarten students, .27 for the
elementary school students, .31 for middle school students, and .26 for high school
students. Thus, with the exception of the high school students, there seems to be a
trend of increasing ES from kindergarten to middle school. Pairwise comparisons
between the four grade levels were conducted using Bonferroni adjusted alpha lev-
els of .008 per test (.05/6). All of the pairwise comparisons between the four groups
were significant at p < .001, with the exception of the pairwise comparison of ele-
mentary school and high school ES.
Replication Sample
Following sampling procedure in White’s (1982) review, the comparison sam-
ple included 207 correlations. This number is comparable to the 219 correlations
in White’s review. The two reviews were also comparable in terms of the number
of journal articles. The current review was based on 58 journal articles published
between 1990 and 2000, and White’s review was based on 59 journal articles pub-
lished between 1918 and 1975.
Sirin
Comparisons across the two meta-analyses also showed that for both studies,
parental education was the most frequently used measure of SES, but parental
income and parental occupation also continued to be commonly used as a single
measure of SES. Among these traditional three components of SES, income was
the strongest correlate in both meta-analyses.
Discussion
The general goals of this study were to (a) determine the extent to which a sig-
nificant relation exists between SES and academic achievement based on research
published between 1990 and 2000; (b) assess the influence of several moderating
factors in this relation; and (c) estimate whether this relation has changed in com-
parison with the findings from White’s (1982) study.
Methodological Issues
The findings show that the studies used several conceptual frameworks to cap-
ture students’ social and economic background. Overall, this meta-analysis pro-
vides empirical evidence regarding how the type of SES measure affects the
strength of correlations found. This information suggests that researchers should
consider the following four factors when conceptualizing SES: (a) the unit of
analysis for SES data; (b) the type of SES measure; (c) the range of the SES vari-
able; and (d) the source of SES data.
439
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SES data were collected from parents, however, the results were likely to be much
higher. As Entwisle and Astone (1994) suggest, information about students’ SES
should be collected from parents, as they are the authoritative source on their own
socioeconomic status. One could, therefore, argue that students are likely to over-
estimate their family background, which would artificially limit the variability of
the SES measure by pushing it upward. It is also possible that they overestimate
their family resources, because they might be reluctant to admit having limited
resources. In a recent study, Ensminger et al. (2000) examined the extent to which
adolescents accurately report their family’s SES. Both mothers and adolescents
completed questionnaires that included measures of SES. Although the results
show relatively high agreement on SES measures between the two sources of infor-
mants, the agreement level varied by age, family structure, and school perfor-
mance. Older students, students from two-parent households, and higher-achieving
students were more likely to report accurately than were younger students, students
from single-parent households, and lower-achieving students.
Achievement Measures
Studies reviewed in this analysis assessed students’ academic achievement
using different types of academic achievement measures. Single subject achieve-
ment measures, such as verbal achievement, math achievement, and science
achievement, yielded significantly larger correlations than general achievement
measures (e.g., GPA or a composite achievement test). It is possible that global
achievement measures conceal differences between subject areas (math and ver-
bal achievement, for example) and therefore obscure meaningful differences
between subject domains. For example, when the studies assessed academic
achievement at the subject level, the correlations were strongest with math achieve-
ment as compared with verbal and science achievement.
Student’s Grade Level
Unlike the results presented by White (1982) and Coleman et al. (1966), the cur-
rent review suggests that the relationship between SES and academic achievement
increases across various levels of schooling, with the exception of the high school
samples. The overall trend was that the magnitude of the SES–academic achieve-
ment relationship increased significantly by each school level, starting from
primary school and continuing to middle school. For the high school samples,
however, the average ES was similar to that of elementary school samples. In
general, this finding is in agreement with the findings from longitudinal studies,
which show that the gap between low- and high-SES students is most likely to
remain the same, if not to widen. In addition, because academic achievement
typically is a cumulative process, in which early school achievement provides a
basis for subsequent educational achievement in later years of schooling, it is pos-
sible that those students who are doing poorly in elementary school because of their
family SES are more likely to drop out of school in later years and therefore are
not included in research samples in the later years of schooling.
This finding should be interpreted with caution because only longitudinal
studies can provide accurate estimates of true intra-individual change over time.
Although the present review included some longitudinal studies (Carlson et al.,
1999; Chen, Lee, & Stevenson, 1996; Gonzales, Cauce, Friedman, & Mason, 1996;
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school location, combined with the finding that higher concentrations of minority
students in a sample decrease the correlation between SES and school perfor-
mance, suggest that the influence of family SES on school performance is contex-
tual. In other words, the impact of family SES varies for individuals depending on
where they live and the cohort with whom they go to school.
Comparisons With White’s (1982) Review
The final question that this review addressed was whether the relationship
between SES and school achievement is any different in the 1990s from that
reported in White’s (1982) study. To provide a comparison across the two studies,
I used the same meta-analytical procedures adopted by White. The findings for this
replication study are, therefore, slightly different from the ones presented so far
because White’s meta-analytical procedures were different from the ones adopted
by the present meta-analysis.
Overall, the magnitude of the SES–school achievement relationship is not as
strong as was reported in White’s (1982) meta-analysis. Studies published before
1980 reported a mean correlation of .343, which is higher than what was found in
this meta-analysis (.299). This is the most comparable finding because both corre-
lations were drawn from published journal articles. The decline is in line with
White’s observation that there was a slight trend toward lower correlations
between SES and school achievement for the more recent studies in his sample.
The weaker correlation between SES and school achievement in the current review
may be attributed to several factors, including changes in research on SES and
school achievement, and changes experienced in the larger social and economic
context. As outlined before, unlike the earlier research, which conceptualized SES
as a static phenomenon, recent research emphasizes a contextual developmental
approach to both SES and school performance. As a result, there is an increasing
emphasis on using more precise measurements of social and economic background
(Entwisle & Astone, 1994). For example, traditional research measured the father
or father figure’s social and economic characteristics, such as education and labor
force status, as the most salient indicators of SES, whereas current research gener-
ally tries to gather information from both mothers and fathers. It is also possible that
the weaker correlation in the current review, as compared with White’s (1982)
review, may reflect social and overall policy changes over time. For example, the
increasing access to learning materials such as books, TV, and computers, as well
as the availability of compensatory education, may have helped to reduce the impact
of SES on academic achievement in recent years. More important, unlike the ear-
lier research that overlooked and understudied students from diverse ethnic back-
grounds, there seems to be more emphasis on diverse students in recent decades
(McLoyd, 1998). Likewise, the economic desegregation between urban and non-
urban schools was not as pronounced as it currently is. Hence the correlation
reported in this study is likely to be reduced partly because of the increasing num-
ber of minority and urban students in published studies, as reported correlations for
both of these groups were significantly lower than for the rest of the student body.
Limitations of This Review
The results of this review should be interpreted with caution for several reasons.
First, its focus is limited to studies published during a certain period: 1990–2000.
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of the magnitude of the difference between the student level and the school/
neighborhood levels of analysis, future research should consider using aggregate
data appropriately in understanding individual-level processes. For example mul-
tilevel modeling techniques can now be used for combining individual-level data
with school- or aggregate-level data. This method can deal with the issue of the
ecological fallacy because it simultaneously estimates individual and school-level
effects (Bryk & Raudenbush, 1992).
Second, socioeconomic status is a multi-dimensional construct, and differ-
ent components yield different results. Of six major components of SES,
researchers most often choose the three traditional ones—income, education, and
occupation—as the basis for their SES conceptualization. Researchers should
make an effort to use multiple components of SES in their operationalization
because, when only a single component is chosen, the results are more likely to
overestimate the effect of SES.
Third, the use of participation in school lunch programs as a measure of SES,
though common, is conceptually problematic. The process of determining eligibil-
ity is open to mistakes; and, more important, the effect that participation in a school
lunch program itself might have on students’ school performance is difficult to dif-
ferentiate from the effect of SES. Furthermore, research shows that eligibility for
full or partial school lunch programs only weakly correlates with academic
achievement as grade level rises, possibly because adolescents are less likely than
younger children to file applications (McLoyd, 1998). Despite these limitations,
eligibility for lunch programs is still one of the most commonly used SES measure
in the current literature on academic achievement, partly because it is easier to
obtain than school records and does not require having to gather data from students
and parents. As was also pointed out by Hauser (1994), researchers should avoid
using school lunch eligibility as an SES indicator for students.
Fourth, the findings of this review suggest that only a small number of studies
considered neighborhood characteristics as part of their assessment of students’
social and economic background. Research on neighborhood SES has generally
used census tract data to assess neighborhood SES structure. This approach has its
limitations because it may refer to many communities with different features, and
it only provides a distal marker for community SES, which may not best reflect the
community SES itself. Despite these limitations, the census tract may provide
some insight into the relationship between SES and academic achievement that
may not be possible to delineate with family SES variables alone. In addition to
neighborhood census tract data, future research should find new ways to incorpo-
rate neighborhood characteristics into the operationalization of SES. There are
promising alternatives, such as various neighborhood risk measures (for examples,
see Gonzales et al., 1996; Greenberg, Lengua, Coie, Pinderhughes, 1999). These
alternatives may provide more accurate ways to capture the effects of family SES
in relation to the overall socioeconomic well-being of the neighborhood where they
live and send their children to school.
Fifth, SES seems to have different meanings for students from different ethnic
backgrounds. One of the main findings of this review was that, for minorities, SES
did not seem to be as strongly related to academic achievement as it was for
Whites. For White students, SES is an essential variable that should continue to be
examined; but for minorities, it is limited in its capacity to capture students’ social
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dents at risk for poor school performance or failure (Dalaker & Proctor, 2000). Thus,
to significantly reduce the gap in achievement between low-and high-SES students,
policy decisions at the local, state, and federal levels must aim at leveling the play-
ing field for students deemed to be at risk academically as a result of their family SES.
Furthermore, poverty in the 1990s has become more concentrated in inner-city
neighborhoods and among minorities (Wilson, 1996), two groups for whom, as the
present review indicates, the influence of family SES on academic achievement is
significantly lower than it is for other student groups. Thus, even when the current
school financing system achieves its goal of financial equity between poor and
wealthy school districts, it does not necessarily achieve a comparable “ecological
equity”—because students in poor and wealthy school districts do not enjoy compa-
rable living circumstances outside school (Clune, 1994). In addition to differences
at the family-SES level, children who live in poor school districts, as compared with
children who live in wealthy school districts, also have to deal with limited social
services, more violence, homelessness, and illegal drug trafficking (Wilson, 1987,
1996). Likewise, many poor urban and rural schools need more financial incentives
to attract and keep qualified teaching staff and thus need more funding than their
counterparts in suburban areas (Wenglinsky, 1998). To address these social and
educational inequalities, policymakers should focus on adequacy—that is, sufficient
resources for optimal academic achievement—rather than equity as a primary edu-
cation policy goal (Clune, 1994). Poor school districts have more than their equal
share of challenges to deal with, and consequently they need adequate financial
resources that may be more than equal to those needed by wealthier schools.
As a result of current educational and social policies, students who are at risk
because of family SES are more likely to end up in schools with limited financial
resources. Despite these limitations, there have been many interventions that have
successfully improved the educational achievement of those who might otherwise
fail in school because of their family background. For example, small school and
class size (Glass & Smith, 1989), early childhood education, federal programs such
as Title 1 and Head Start, after-school programs and summer school sessions
(Entwisle & Alexander, 1994), and financially qualified school personnel (Wang et
al., 1993), all have been found to be important factors in reducing the achievement
gap between children of the “haves” and the “have-nots.” Future educational and
social programs should provide more support for these and other innovative pro-
grams that can lift the educational achievement of those who are at risk for school
failure because of family SES. Without such support, the current system is likely to
produce an intergenerational cycle of school failure because of family SES.
Conclusions
This meta-analysis is the second review of literature relating to SES and school
achievement, the last having been conducted 20 years ago (White, 1982). Since
White’s review, there have been several changes both in the literature on the
SES–achievement relationship and in meta-analytical procedures. The current
review uses these advances in research methodology, provides an empirically valid
and conceptually rich statistical summary of the literature, and offers a critical
examination of how several moderating factors influence the relationship between
SES and academic achievement. The findings of this review will serve a practical
use for education researchers and policymakers in their efforts to better assess the
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