What is the term for a measurable trait or characteristic?

Operationalization means turning abstract concepts into measurable observations. Although some concepts, like height or age, are easily measured, others, like spirituality or anxiety, are not.

Through operationalization, you can systematically collect data on processes and phenomena that aren’t directly observable.

• self-rating scores on a social anxiety scale
• number of recent behavioral incidents of avoidance of crowded places
• intensity of physical anxiety symptoms in social situations

Why operationalization matters

In quantitative research, it’s important to precisely define the variables that you want to study.

Without transparent and specific operational definitions, researchers may measure irrelevant concepts or inconsistently apply methods. Operationalization reduces subjectivity and increases the reliability of your study.

Your choice of operational definition can sometimes affect your results. For example, an experimental intervention for social anxiety may reduce self-rating anxiety scores but not behavioral avoidance of crowded places. This means that your results are context-specific, and may not generalize to different real-life settings.

Generally, abstract concepts can be operationalized in many different ways. These differences mean that you may actually measure slightly different aspects of a concept, so it’s important to be specific about what you are measuring.

If you test a hypothesis using multiple operationalizations of a concept, you can check whether your results depend on the type of measure that you use. If your results don’t vary when you use different measures, then they are said to be “robust.”

How to operationalize concepts

There are 3 main steps for operationalization:

1. Identify the main concepts you are interested in studying.
2. Choose a variable to represent each of the concepts.
3. Select indicators for each of your variables.

1. Identify the main concepts you are interested in studying.

Based on your research interests and goals, define your topic and come up with an initial research question.

There are two main concepts in your research question:

• Sleep
• Social media behavior

2. Choose a variable to represent each of the concepts.

Your main concepts may each have many variables, or properties, that you can measure.

For instance, are you going to measure the amount of sleep or the quality of sleep? And are you going to measure how often teenagers use social media, which social media they use, or when they use it?

• Alternate hypothesis: Lower quality of sleep is related to higher night-time social media use in teenagers.
• Null hypothesis: There is no relation between quality of sleep and night-time social media use in teenagers.

3. Select indicators for each of your variables.

To measure your variables, decide on indicators that can represent them numerically.

Sometimes these indicators will be obvious: for example, the amount of sleep is represented by the number of hours per night. But a variable like sleep quality is harder to measure.

You can come up with practical ideas for how to measure variables based on previously published studies. These may include established scales or questionnaires that you can distribute to your participants. If none are available that are appropriate for your sample, you can develop your own scales or questionnaires.

• To measure sleep quality, you give participants wristbands that track sleep phases.
• To measure night-time social media use, you create a questionnaire that asks participants to track how much time they spend using social media in bed.

After operationalizing your concepts, it’s important to report your study variables and indicators when writing up your methodology section. You can evaluate how your choice of operationalization may have affected your results or interpretations in the discussion section.

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Strengths of operationalization

Operationalization makes it possible to consistently measure variables across different contexts.

• Empiricism

Scientific research is based on observable and measurable findings. Operational definitions break down intangible concepts into recordable characteristics.

• Objectivity

A standardized approach for collecting data leaves little room for subjective or biased personal interpretations of observations.

• Reliability

A good operationalization can be used consistently by other researchers. If other people measure the same thing using your operational definition, they should all get the same results.

Limitations of operationalization

Operational definitions of concepts can sometimes be problematic.

• Underdetermination

Many concepts vary across different time periods and social settings.

For example, poverty is a worldwide phenomenon, but the exact income-level that determines poverty can differ significantly across countries.

• Reductiveness

Operational definitions can easily miss meaningful and subjective perceptions of concepts by trying to reduce complex concepts to numbers.

For example, asking consumers to rate their satisfaction with a service on a 5-point scale will tell you nothing about why they felt that way.

• Lack of universality

Context-specific operationalizations help preserve real-life experiences, but make it hard to compare studies if the measures differ significantly.

For example, corruption can be operationalized in a wide range of ways (e.g., perceptions of corrupt business practices, or frequency of bribe requests from public officials), but the measures may not consistently reflect the same concept.

Frequently asked questions about operationalization

What is operationalization?

Operationalization means turning abstract conceptual ideas into measurable observations.

For example, the concept of social anxiety isn’t directly observable, but it can be operationally defined in terms of self-rating scores, behavioral avoidance of crowded places, or physical anxiety symptoms in social situations.

Before collecting data, it’s important to consider how you will operationalize the variables that you want to measure.

What’s the difference between concepts, variables, and indicators?

In scientific research, concepts are the abstract ideas or phenomena that are being studied (e.g., educational achievement). Variablesare properties or characteristics of the concept (e.g., performance at school), while indicators are ways of measuring or quantifying variables (e.g., yearly grade reports).

The process of turning abstract concepts into measurable variables and indicators is called operationalization.