In each trial of an experiment, participants see a warning signal and then, a half second later, see a pair of letters. The participants press one button if the letters are the same (e.g., W W ) and a different button if the letters are different (e.g., P X ). In 80% of the trials, the warning signal is identical to the letters that will be shown on that trial. The following are the warning signals and the test stimuli presented on Trial 97 of the procedure. Group 1: warning signal = L; test pair = L L
Group 2: warning signal = U; test pair = L L
Group 3: warning signal = +; test pair = L L
In this setup we should expect the fastest responses from

Question

Quizplus · Accepted Answer

Group 1 has the same warning signal and test pair, which means they will have the fastest response times due to the 80% match rate. Group 2 has a different warning signal, so their response times may be slower. Group 3 has a symbol as a warning signal, which may not provide as strong of a cue as a letter, leading to slower response times compared to Group 1. Therefore, we can expect the fastest responses from Group 1 and slowest responses from Group 3. Thus, the best answer choice is C.

In Each Trial of an Experiment, Participants See a Warning