Drew is running a study on the effects of alcohol on memory recall. He has two groups: one that receives alcohol and one that receives water. He checks in on the progress of the alcohol group more frequently and may have given that group more instructions. The MOST obvious weakness of Drew's study is ______.
A) placebo effects
B) experimenter effects
C) internal validity
D) generalizability

Question

Quizplus · Accepted Answer

Experimenter effects refer to the unintentional influence of the experimenter on the participants or the study results. Drew's more frequent check-ins and additional instructions given to the alcohol group can create bias in the study results as the experimenter may be inadvertently influencing the memory recall of the alcohol group. This reduces the validity of the study.

Drew Is Running a Study on the Effects of Alcohol