A researcher studies the effect of interpersonal distance (near, far) and personality type (introvert, extrovert) on feelings of anxiety. The researcher has used a(n) design

D. IV x PV factorial

Explanation:

The IV x PV factorial is a tyoe of factorial design which tend to include both an experimental independent variable (IV) and a nonexperimental participant variable (PV).

In the case sited the researcher used both IV and PV to get his result.

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