If, during any phase of an investigation, participants' behavior is influenced by factors unrelated to the hypothesis, then the __________ of the study is in doubt.

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Internal validity refers to the degree to which a study accurately tests its intended variables or hypothesis. If participants' behavior is influenced by factors unrelated to the hypothesis during any phase of the investigation, then the internal validity of the study can be in doubt. Inter-rater reliability refers to the consistency of ratings or measurements made by different raters or assessors. Test-retest reliability refers to the consistency of measurements taken at different points in time. External validity refers to the extent to which study findings can be generalized to other populations, settings, or contexts.

If, During Any Phase of an Investigation, Participants' Behavior Is