Abstract: Many theories have their inconsistent view on attentional effect on perceptual learning of feature level and feedback effect. The present study explored attentional effect in perceptual learning by distributing attention with cue’s different validity, and explored feedback effect by four different subject groups that got different feedback. The task required the subjects to search target word “L” from the presented distracter words. The study was divided into two experiments: experiment 1 explored whether there was attentional effect in features’ search, experiment 2 explored whether there was attentional effect in features’ perceptual learning and the feedback effect. The results indicated: There was attentional effect in perceptual learning of feature level; the different feedback subjects got different acuity, which was relative with the strategy which the subjects used in learning. The possible reasons were discussed.

Key words: the features’ perceptual learning, attention effect, feedback effect