In a detection experiment, Randy says "yes" to 90% of the trials, and Perry says "yes" to 70% of the trials. Our best conclusion from this study is
A) Randy's threshold is higher than Perry's.
B) Perry is more sensitive than Randy.
C) response criterion may be different for Randy and Perry.
D) Randy and Perry are equally sensitive.

Question

Quizplus · Accepted Answer

Since both Randy and Perry have different response rates, it suggests that they may have different response criterion, meaning that they have different points at which they feel confident enough to say "yes." This doesn't necessarily mean that one is more sensitive than the other, so we cannot conclude B. It also doesn't necessarily mean that Randy's threshold is higher than Perry's, as they could have different reasons for their response rates. Therefore, the best conclusion is that their response criterion may be different.

In a Detection Experiment, Randy Says "Yes" to 90% of the Trials