Operational Definitions in Behavioral Psychology: Study Guide

Operational Definitions in Psychology

Introduction to Operational Definitions

Operational definitions are essential in psychology for ensuring clarity, consistency, and reliability in behavioral research and practice. They specify exactly how a concept or behavior will be measured or identified, allowing for accurate data collection and interpretation.

• Definition: An operational definition describes a concept in terms of the specific, observable, and measurable actions or criteria used to identify it.

• Purpose: To ensure all researchers and practitioners interpret behaviors in the same way, facilitating procedural fidelity and guiding treatment decisions.

• Example: Defining "in-seat" behavior as "the individual's buttocks are in contact with the chair and both feet are on the floor or footrest."

Why Operational Definitions Matter

Clear operational definitions are crucial for:

• Accurate and reliable measurement

• Comparing and interpreting data

• Ensuring procedural fidelity

• Guiding treatment decisions

Critical Components of an Operational Definition

Effective operational definitions must include:

• Objective, observable criteria

• Clear examples and non-examples

• Active behaviors (passing the Dead Man’s Test)

Objective vs. Subjective Language

Operational definitions should use objective language, focusing on observable actions rather than inferred intentions or feelings.

• Objective Example: "Grinding coffee" – The individual holding the grinder handle and rotating it in a complete 360-degree circle.

• Subjective Example (to avoid): "Grinding coffee" – Using one’s hands to forcefully turn the grinder handle over and over again.

Behavior and Private Events

While Skinner considered private events (thoughts and feelings) as behaviors, operational definitions should focus on publicly observable actions. Private events can only be measured through self-report.

• Self-reported thoughts and feelings: Recording each instance of negative self-talk.

• Other people’s self-reports: Students reporting instances of negative self-talk.

The Dead Man’s Test

The Dead Man’s Test, developed by Ogden Lindsley, states that if a dead man can "do it," then it does not qualify as a behavior. Only active, observable behaviors should be included in operational definitions.

• Examples of inaction to avoid: "Not in seat," "Failure to clean up," "Missing work," "Not showing up to work."

Examples and Non-Examples in Definitions

Including examples and non-examples in operational definitions improves data collection accuracy and clarifies gray areas.

• Example: Property destruction – Drawing on the wall with a permanent marker; ripping paper into two pieces; stepping on a glue stick and snapping the casing.

• Non-example: Coloring in a coloring book; breaking down a Lego structure during clean-up; opening food packaging.

Functional vs. Topographical Definitions

Operational definitions can be functional or topographical:

• Functional Definition: Describes behavior based on its effect or purpose focuses on the OUTCOME or EFFECT

  • should be used when all forms of a response class can be counted

  • ex: the basketball passes through the net

• Topographical Definition: Describes behavior based on its physical form or movement Focuses on the SHAPE or FORM

  • should be used when the functional outcome is not always produced by the behavior of interest

  • Ex: the individual holding the basketball with both hands, and positions their shooting hand under the ball etc....

Operational Definitions vs. Behavioral Objectives

Behavioral objectives are broader and include additional components beyond the operational definition:

• Identify the learner

• Identify the target behavior

• Specify intervention conditions

• Set criteria for acceptable performance

Example: "In the period from 9:00-9:20am, Tanika will remain in her seat, unless given permission to leave, for 5 consecutive days."

Questions to Ask After Creating a Definition

• Is the definition objective and observable?

• Does it pass the Dead Man’s Test?

• Are examples and non-examples included?

• Is it clear enough for others to use reliably?

Practicing Operational Definitions

To improve your skill in writing operational definitions:

• Ask supervisors for feedback

• Observe behaviors in your environment

• Consult academic literature for examples

Quick Refresher on "Behavior"

Skinner’s Definition

B.F. Skinner (1938) defined behavior as "the movement of an organism or of its parts in a frame of reference provided by the organism or by various external objects or fields." This emphasizes observable movement as the core of behavior.

Johnston and Pennypacker’s Definition

Johnston and Pennypacker (2009) defined behavior as "that portion of an organism’s interaction with its environment that involves movement of some part of the organism." This highlights the interaction between the organism and its environment.

Summary Table: Operational Definitions vs. Behavioral Objectives

Aspect	Operational Definition	Behavioral Objective
Purpose	Specify observable criteria for behavior	Set goals for behavior change
Components	Objective, clear, complete. includes examples & non-examples	Learner, target behavior, conditions, criteria
Measurement	Direct observation	Performance over time
Application	Data collection, research, intervention	Intervention planning, progress monitoring

Conclusion

Operational definitions are foundational in behavioral psychology, enabling precise measurement and effective intervention. Mastery of this skill is essential for both research and applied practice.