Operatinal

Student as researcher: how
approach a research project
to
Step 4: Form Operational Definitions

Once researchers develop hypotheses, they are ready to begin identifying the
specific methods for their study. The next step involves forming operational
definitions of the concepts to be investigated in the research.
What is an operational definition?
< Specific definition of a concept in a research study
An operational definition defines a concept solely in terms of the operations (or
methods) used to produce and measure it. For example, we might operationally
define "social capital" using a paper-and-pencil questionnaire designed to measure
indicators of social capital such as number of partners a company has, the reputation
a company enjoys, and the position of a company in its industry. To operationally
define the "contracting" we might look at how many men hours were invested in the
contracting process or we might even count the number of pages of a contract. With
these operational definitions, we might test the hypothesis that social embeddedness
reduces contracting.
Not everyone may accept these definitions. For example, some may say that
important aspects of social capital are missing from our questionnaire. From a crosscultural perspective, others may criticize our operational definition of "contracting"
because some in some industries agreements are codified in written contracts, while
in other industries oral agreements are rather common. However, once we decide on
a particular operational definition for our study, no one can argue about the definition
of the concept for our study. Operational definitions help researchers to communicate
about their concepts. An important question you should ask as you read research is,
How did the researcher operationally define his/her concepts?
How do I decide what operational definition to use?

< Previous research
As with forming research questions and hypotheses, we identify operational
definitions by reading research articles that examine the same concepts we intend to
investigate. What measures have other researchers used? What are the strengths
and weaknesses of these measures? These are some of the questions researchers
ask as they decide the ways in which they will operationally define the concepts in
their research.
In most cases, there's no need to "reinvent the wheel." Scientists have studied a wide
range of topics, and many measures exist for many concepts. Most likely, you will be
able to build on previous research by using the same operational definitions
employed by other researchers.
What is a variable?
< A dimension or factor that varies
As you read research studies, you will find that researchers talk about "variables." A
variable is a dimension or factor that varies. For example, companies vary in the
social capital they have accumulated, and contracts vary in their extensiveness.
How do I measure abstract concepts?
< Abstract measurement, observer agreement, self-report scales
Scientists use both physical measurement and derived indicative measurement.
Physical measurement involves dimensions for which people agree on the standard
and instruments for measurement - for example, length, weight, and time. However,
for many concepts in business research, there is no common widely accepted scale.
Take company performance as an example, profit is widely used and accepted, but if
we want to measure the performance of new ventures, profit might not reflect their
performance and researchers often use growth rates or revenue. The value of a
company market capitalization is another common performance measure, but this
measure is often difficult to obtain for private companies not traded on stock
markets. In the case of performance we have objective indicators, but researchers
use different indicators depending on the context of their research. Other concepts
used in business research are even more vague. Take corporate social responsibility
as an example. What does this concept mean? Are companies obeying the law
socially responsible, does it refer to how companies deal with their employees and
other direct stakeholders or should it incorporate indirect stakeholders, such as
society as a whole. How do we measure these concepts?
One way to measure abstract concepts is to have two or more observers rate a
behaviour or action using a rating scale. For example, two observers may agree that
the image of an organization is a score of "7" on a 1 to 10 scale of quality of a
business school program. When observers agree we become more confident in our
quality measure.
Often, however, we're interested in measuring concepts, such as reputation, that
cannot be readily observed. To measure such constructs researchers typically use
self-report questionnaires. A typical rating scale may ask respondents to report the
extent to which they disagree or agree with several statements using a 1 (Strongly
Disagree) to 5 (Strongly Agree) rating scale. Self-report questionnaires are widely
used measurement instruments in business research.
How do I know whether I have good measures of my concepts?
< Validity, reliability
Validity refers to the "truthfulness" of a measure; that is, does it measure what it is
intended to measure? Although validity may seem straightforward, a few examples
will illustrate that validity isn't easily achieved, particularly for complex concepts.
One example concerns the measurement of intelligence. Many psychologists have

debated whether the most frequently used measures of intelligence, which
emphasize verbal and spatial ability, adequately assess all aspects of intelligence. Do
these tests assess creativity, emotional intelligence, social intelligence, and good-old
common sense?
The reliability of a measure refers to its consistency. Researchers may refer to
several different types of reliability. For example, when observers agree about the
quality of a programme, we say they are reliable (i.e., they are consistent in their
observations). Measures are also reliable if they are consistent over time. If a
person's intelligence score doesn't change (relative to others'), we say the
intelligence test is reliable.
Researchers want to use valid and reliable measures of their concepts. You may see
that if an invalid and unreliable measure is used, it's hard to interpret the findings of
a research study. This is because we wouldn't be able to know whether the concept
was defined truthfully and consistently. Because it's important to have good
measures, many researchers conduct psychological studies to develop valid and
reliable measures of concepts. Good studies will discuss the reliability and validity of
their measures in the methodology section.
Step 4: Form Operational Definitions
Recall the previous step:
The main question of our research has been to investigate the relationship between
social networks and the chance to start a business.
Our theoretical considerations emphasized that next to the structure of networks,
i.e. loose versus dense networks, the characteristics of the people is related to
matters. Thus, we need to develop measurements that capture the characteristics of
people in the whole network.
Operational definition for starting a business:
This variable was operationalized by checking whether a respondent has opened and
registered a business or not. Although starting a business seems to be a clear-cut
phenomenon, there is of course a grey area. For example, what about people who are
right in the start-up process, i.e. they are talking to potential customers, they are
working on the finance etc., but have not started their business officially, i.e.
registered it. We considered respondents who still were in the start-up phase or
orientation phase as not having started a business, i.e. a business registered at the
chamber of commerce was a pre-requirement to be considered as a business starter.
However, not everybody registering a new business at the chamber of commerce is a
business starter. Sometimes, people register a business because the business simply
moved from one town to the other. Sometimes, a newly registered business has been
the part of an existing business. We excluded such observations from our sample.
Operational definition the across characteristics of network actors
Operationalizing characteristics of a network is problematic, as it requires to

aggregate individual responses. In our research, we collected the network data by
asking the respondent to name people to whom the respondent has talked about
starting a business, to name people who had supported the respondent while starting
the business etc. The answers to these questions provided us with a list of names
(persons), who were important contacts for the respondent in the process of starting
a business. For each of these names we asked a couple of further informative
questions, regarding the age of the contact and whether the contact was selfemployed. Moreover, we asked how long the respondent has known the contact and
how often they met and what type of relationship the respondent had with the
contact: family, friend or business relation. These questions described each contact
and provided us with the information to describe the characteristics of the
respondents network. For example, we could calculate the share of contacts who
were self-employed or we could calculate which share of contacts was family based.
When you evaluate research evidence, you must identify the researcher's operational
definitions. Ask yourself these questions when evaluating research evidence:
How did the researcher operationally define his/her concepts?
Did the researcher provide a clear rationale for his/her operational definitions?
Did the researcher use valid and reliable measures of his/her concepts?
Did the researcher use several measures of concepts?

(Several measures are better than one measure.)

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Student as researcher: how

approach a research project

Step 4: Form Operational Definitions

How do I decide what operational definition to use?

One example concerns the measurement of intelligence. Many psychologists have

Operational definition the across characteristics of network actors

Operationalizing characteristics of a network is problematic, as it requires to

Did the researcher use several measures of concepts?

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