Stimulus Equivalence and Reaction Time in Extended Testing

Reaction time data in stimulus equivalence experiments typically shows a pattern of increased reaction time from training to test and higher reaction time for equivalence and transitivity trials than for symmetry trials. Test phases are, however, often conducted with a minimum of test trials to avoid fatigue and troublesome effects of extinction. In the present experiment, 36 participants experienced prolonged testing and were given three to five test phases with a short break in between. The present paper will focus on analysis of reaction time data in these participants.