Further Evidence for Intrasession Decrements in Eyelid Conditioning

Abstract

4 groups of 20 Ss were given 100 classical eyelid conditioning trials on each of five days. The groups formed a 2 × 2 design with CS Intensity and Room Illumination as the factors involved. Results showed: (1) an increase in CRs over days with more rapid conditioning in the dimmer room; (2) consistent decreases in CRs within sessions, more apparent with the dimmer CS; (3) consistent decreases in latency over trials within a session; and (4) over-all higher performance with the brighter CS.