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

Multiple Choice

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