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CH 6. Descriptive Research Design - Survey and Observation

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Chapter Six

Descriptive Research Design:


Survey and Observation
6-2

A Classification of Survey Methods


Fig. 6.1
Survey
Methods

Telephone Personal Mail Electronic

In-Home Mall Computer-Assisted Internet


E-mail
Intercept Personal
Interviewing

Traditional Computer-Assisted
Mail Mail
Telephone Telephone
Interview Panel
Interviewing
6-3

Some Decisions Related to the Mail Interview Package


Table 6.1

Outgoing Envelope
Outgoing envelope: size, color, return address
Postage Method of addressing
Cover Letter
Sponsorship Type of appeal Postscript
Personalization Signature
Questionnaire
Length Size Layout Format
Content Reproduction Color Respondent anonymity
Return
Envelo
Type of envelope Postage
pe
Incentives
Monetary versus non-monetary Prepaid versus promised amount
6-4

Criteria for Evaluating Survey Methods


Flexibility of Data Collection
■ The flexibility of data collection is determined primarily by the
extent to which the respondent can interact with the interviewer
and the survey questionnaire.

Diversity of Questions
■ The diversity of questions that can be asked in a survey
depends upon the degree of interaction the respondent has with
the interviewer and the questionnaire, as well as the ability to
actually see the questions.

Use of Physical Stimuli


■ The ability to use physical stimuli such as the product, a product
prototype, commercials, or promotional displays during the
interview.
6-5

Criteria for Evaluating Survey Methods


Sample Control
■ Sample control is the ability of the survey mode to reach the
units specified in the sample effectively and efficiently.

Control of the Data Collection Environment


■ The degree of control a researcher has over the environment in
which the respondent answers the questionnaire.

Control of Field Force


■ The ability to control the interviewers and supervisors involved
in data collection.

Quantity of Data
■ The ability to collect large amounts of data.
6-6

Random Digit Directory Designs


Fig. 6.2
Adding a Constant to the Last Digit
An integer between 1 and 9 is added to the telephone number
selected from the directory. In plus-one sampling, the
number added to the last digit is 1.
Number selected from directory: 404-953-3004
(exchange-block). Add one to the last digit to
form
404-953-3005. This is the number to be included
in the sample.

Randomizing the r Last Digits


Replace the r (r = 2, 3, or 4) last digits with an equal number
of randomly selected digits.
Number selected from directory: 404-881-1124. Replace the
last four digits of the block with randomly selected numbers 5,
6-7

Random Digit Directory Designs


Fig. 6.2

Two-Stage Procedure
The first stage consists of selecting an exchange and telephone
number from the directory. In the second stage, the last three
digits of the selected number are replaced with a three-digit
random number between 000 and 999.

Cluster 1
Selected exchange: 636
Selected number: 404-636-3230
Replace the last three digits (230) with randomly selected 389 to
form 404-636-3389.
Repeat this process until the desired number of telephone numbers
from this cluster is obtained.
6-8

Criteria for Evaluating Survey Methods


Response Rate
■ Survey response rate is broadly defined as the percentage of
the total attempted interviews that are completed.

Perceived Anonymity
■ Perceived anonymity refers to the respondents' perceptions that
their identities will not be discerned by the interviewer or the
researcher.

Social Desirability/Sensitive Information


■ Social desirability is the tendency of the respondents to give
answers that are socially acceptable, whether or not they are
true.
6-9

Criteria for Evaluating Survey Methods


Potential for Interviewer Bias
■ The extent of the interviewer's role determines the

potential for bias.

Speed
■ The total time taken for administering the survey to

the entire sample.

Cost
■ The total cost of administering the survey

and collecting the data.


6-10

A Comparative Evaluation of Survey Methods


Table 6.2

Criteria Phone/ In-Home


Mall-Interce Mail Mail
CATI Interviewspt Interviews CAPI Surveys Panels E-Mail Internet
Observation Methods
6-11

Structured versus Unstructured Observation

■ For structured observation, the researcher


specifies in detail what is to be observed and
how the measurements are to be recorded,
e.g., an auditor performing inventory analysis
in a store.

■ In unstructured observation, the observer


monitors all aspects of the phenomenon that
seem relevant to the problem at hand, e.g.,
observing children playing with new toys.
Observation Methods
6-12

Disguised versus Undisguised Observation

■ In disguised observation, the respondents


are unaware that they are being observed.
Disguise may be accomplished by using
one-way mirrors, hidden cameras, or
inconspicuous mechanical devices.
Observers may be disguised as shoppers or
sales clerks.

■ In undisguised observation, the


respondents are aware that they are under
observation.
Observation Methods
6-13

Natural versus Contrived Observation

■ Natural observation involves observing


behavior as it takes places in the
environment. For example, one could
observe the behavior of respondents eating
fast food in Burger King.

■ In contrived observation, respondents'


behavior is observed in an artificial
environment, such as a test kitchen.
6-14

A Classification of Observation Methods


Fig. 6.3

Classifying
Observation
Methods

Observation Methods

Personal Mechanical Audit Content Trace


Observation Observation Analysis
Analysis
Observation Methods
6-15

Personal Observation

■ A researcher observes actual behavior


as it occurs.
■ The observer does not attempt to
manipulate the phenomenon being
observed but merely records what takes
place.
■ For example, a researcher might record
traffic counts and observe traffic flows
in a department store.
Observation Methods
6-16

Mechanical Observation
Do not require respondents' direct participation.
■ the AC Nielsen audimeter
■ turnstiles that record the number of people
entering or leaving a building.
■ On-site cameras (still, motion picture, or

video)
■ Optical scanners in supermarkets

Do require respondent involvement.


■ eye-tracking monitors
■ pupilometers
■ psychogalvanometers
■ voice pitch analyzers
■ devices measuring response latency
Observation Methods
6-17

Audit
■ The researcher collects data by examining
physical records or performing inventory
analysis.
■ Data are collected personally by the
researcher.
■ The data are based upon counts, usually of
physical objects.
■ Retail and wholesale audits conducted by
marketing research suppliers were discussed
in the context of syndicated data in Chapter 4
Observation Methods
6-18

Content Analysis
■ The objective, systematic, and quantitative
description of the manifest content of a
communication.
■ The unit of analysis may be words, characters
(individuals or objects), themes
(propositions), space and time measures
(length or duration of the message), or topics
(subject of the message).
■ Analytical categories for classifying the units
are developed and the communication is
broken down according to prescribed rules.
Observation Methods
6-19

Trace Analysis
Data collection is based on physical traces, or evidence, of past
behavior.

■ The selective erosion of tiles in a museum indexed by the


replacement rate was used to determine the relative popularity
of exhibits.
■ The number of different fingerprints on a page was used to
gauge the readership of various advertisements in a magazine.
■ The position of the radio dials in cars brought in for service was
used to estimate share of listening audience of various radio
stations.
■ The age and condition of cars in a parking lot were used to
assess the affluence of customers.
■ The magazines people donated to charity were used to
determine people's favorite magazines.
■ Internet visitors leave traces which can be analyzed to examine
browsing and usage behavior by using cookies.
6-20

A Comparative Evaluation of Observation Methods


Table 6.3

Criteria Personal Mechanical Audit Content Trace


Observation Observation Analysis Analysis Analysis

Degree of structure Low Low to high High High Medium


Degree of disguise Medium Low to high Low High High
Ability to observe High Low to high High Medium Low
in natural setting
Observation bias High Low Low Medium Medium
Analysis Bias High Low to Low Low Medium
Medium
General remarks Mos Can be Expensive Limited to Method of
flexible tintrusive commu- last resort
nications
6-21

Relative Advantages of Observation


■ They permit measurement of actual behavior
rather than reports of intended or preferred
behavior.
■ There is no reporting bias, and potential bias
caused by the interviewer and the
interviewing process is eliminated or reduced.
■ Certain types of data can be collected only by
observation.
■ If the observed phenomenon occurs
frequently or is of short duration,
observational methods may be cheaper and
faster than survey methods.
6-22

Relative Disadvantages of Observation


■ The reasons for the observed behavior may not be
determined since little is known about the underlying
motives, beliefs, attitudes, and preferences.
■ Selective perception (bias in the researcher's
perception) can bias the data.
■ Observational data are often time-consuming and
expensive, and it is difficult to observe certain forms
of behavior.
■ In some cases, the use of observational methods
may be unethical, as in observing people
without their knowledge or consent.

It is best to view observation as a complement to


survey methods, rather than as being in competition
with them.
A Comparative Evaluation of Survey Methods fo 6-

r International Marketing Research


23

Table 6.4
Criteria Telephone Personal Mail Electronic
High sample control + + - -
Difficulty in locating + - + +
respondents at
home
Inaccessibility of homes + - + +
Unavailability of a large + - + +
pool of trained interviewers
Large population in rural areas + - -
- Unavailability of maps + - + +
Unavailability of current - + - +
telephone directory
Unavailability of mailing lists + + - +
Low penetration of telephones - + -
+ Lack of an efficient postal system + + - +
Low level of literacy - + - -
Face-to-face communication culture + - -
- Poor access to computers & Internet ? + ? -
Note: A (+) denotes an advantage, and a (–) denotes a

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