For a within-subjects experiment,one of the primary threats to internal validity is ____.
A)individual differences that may exist within treatment conditions
B)individual differences that may exist between treatment conditions
C)the risk that participation in one treatment condition may influence scores in other treatment conditions
D)the risk that one (or more) of the treatment conditions will have no influence on the participants' scores

Question

For a within-subjects experiment,one of the primary threats to internal validity is ____.
A)​individual differences that may exist within treatment conditions
B)​individual differences that may exist between treatment conditions
C)the risk that participation in one treatment condition may influence scores in other treatment conditions
D)​the risk that one (or more) of the treatment conditions will have no influence on the participants' scores

Quizplus · Accepted Answer

In a within-subjects experiment, participants are exposed to multiple treatment conditions. The risk of participation in one treatment condition influencing scores in other treatment conditions is a primary threat to internal validity, known as carryover effects. This can be addressed through counterbalancing, where the order of treatments is varied across participants. The other options (A, B, and D) are not primary threats to internal validity in the context of a within-subjects experiment. Individual differences within or between treatment conditions can be controlled through random assignment or matching, and the risk of a treatment having no effect can be addressed through the use of a control condition.

For a Within-Subjects Experiment,one of the Primary Threats to Internal