An Interaction Effect in a Factorial Design Is

Multiple Choice

An interaction effect in a factorial design is

A) a type of experimenter expectancy effect that arises because of the interaction between the experimenter and the research participants.
B) an unanticipated effect that emerges from the study, in contrast to an effect that has been hypothesized in advance.
C) an outcome that occurs when two or more independent variables combine to produce an effect over and above their independent effects.
D) the effect that one independent variable has independently of the effect of the other independent variable.