When comparison group members become aware that they are being denied some advantage, they may increase their efforts to compensate, creating a problem called the Sam Johnson effect.

Question

Quizplus · Accepted Answer

The correct term for this phenomenon is the John Henry effect, not the Sam Johnson effect. It occurs when control group participants in an experiment increase their efforts because they know they are not receiving the intervention being tested.

When Comparison Group Members Become Aware That They Are Being