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Experimenter Bias in AP Psychology

Written by the Fiveable Content Team
Verified for the 2027 exam
Verified for the 2027 exam•Written by the Fiveable Content Team

Definition

Experimenter bias refers to the possibility that a researcher's expectations might skew the results of an experiment.

AP course connection

Topic 1.3: 1.3 Defining Psychological Science: The Experimental Method

Unit 1

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Theoretical Perspectives

Experimenter Bias

Study And Research Findings

Rosenthal and Fode (1963) demonstrated experimenter bias in their study on lab rats, showing that experimenters' expectations could indeed influence the results of an experiment.

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