When individuals' performance on a posttest differs from their initial testing not because of a treatment but because of familiarity with the measure,a __________ threat to internal validity is likely.
A) testing
B) instrumentation
C) regression
D) contamination

Question

Quizplus · Accepted Answer

A testing threat occurs when participants' performance on a posttest is influenced by their previous testing experience, rather than the treatment. This can happen when participants become familiar with the test or when they are influenced by practice effects. The other options (B, C, D) do not relate to familiarity with the measure.

When Individuals' Performance on a Posttest Differs from Their Initial