Imagine a study where participants were given Jell-O shots to consume before participating in experiments where reaction time was measured.However, to the participants' surprise, the Jell-O shots were not made with alcohol.When the participants were debriefed and told that the Jell-O contained no alcohol, some participants refused to drive home until they had sobered up.The participants' responses indicate that __________ was a threat to internal validity.
A)diffusion of treatments
B)instrumentation
C)placebo effect
D)demand characteristics

Question

Quizplus · Accepted Answer

The participants' reactions indicate that they expected the Jell-O shots to contain alcohol and experienced the placebo effect when they did not. This is a threat to internal validity as it can affect the accuracy of the results obtained from the experiments.

Imagine a Study Where Participants Were Given Jell-O Shots to Consume