In an experiment investigating the effects of stress on the desire to affiliate with others, half of the subjects complete an easy test of mental ability and half complete a difficult test. What procedure is used to ensure that any differences in the desire to affiliate are due to differences in test difficulty and not to characteristics of the subjects?
A) random assignment
B) manipulation check
C) pretest
D) replication
E) debriefing

Question

Quizplus · Accepted Answer

Random assignment is used to ensure that any differences in outcomes are due to the experimental manipulation (test difficulty) rather than pre-existing differences among subjects.

In an Experiment Investigating the Effects of Stress on the Desire