An experimental design is:
A) one in which the investigator has direct control over at least one independent variable.
B) less capable of providing evidence of causal relationships than is an exploratory design.
C) less internally valid than a descriptive study.
D) used only in realistic situations.
E) best suited for longitudinal analysis.

Question

Quizplus · Accepted Answer

An experimental design is one in which the investigator manipulates at least one independent variable to observe its effect on a dependent variable, and has direct control over that variable.

An Experimental Design Is