Random assignment controls for important differences among individual participants by balancing them. This is in contrast to designs in which each participant is exposed to each condition or group in an experiment. This latter design controls the individual differences by ____________.
A)randomly sampling them
B)controlling the placebo effect
C)holding them constant
D)balancing these differences between the conditions or groups

Question

Quizplus · Accepted Answer

Random assignment controls for individual differences by evenly distributing these differences across the experimental groups, whereas exposing each participant to every condition (within-subjects design) controls for individual differences by holding them constant, as each participant serves as their own control.

Random Assignment Controls for Important Differences Among Individual Participants by Balancing