Evaluating the Experiment from the Inside: Internal Validity ____ evaluates whether a sad film really made the subjects feel sad.
A)A manipulation check
B)Aggregation across subjects
C)Aggregation across trials
D)Pilot testing

Question

Quizplus · Accepted Answer

Internal validity refers to the extent to which a study can establish a cause-and-effect relationship between the independent and dependent variables. In this case, evaluating whether a sad film really made the subjects feel sad is a test of the manipulation (showing the sad film) of the independent variable. A manipulation check measures whether the manipulation of the independent variable was successful in producing the intended effect on the dependent variable, which is an important aspect of internal validity.

Evaluating the Experiment from the Inside: Internal Validity ____ Evaluates