In this experimental the effects of KR-delay and post-KR-delay intervals were experimentally investigated on discrete motor task. For this purpose, forty female undergraduate students with no infomation and experience about this study task were randomly assigned into 4 different groups. For this test, batting was chosen as the task to be performed and Bassin Anticipation Timer developed by Stanley Bassin was connected with a switch especially designed. The time error of the subjects' performance was recorded on the computer as the subjects' bats touched the switch connected computer. The measurement errors were as calculated as absolute errors. The experimental design used for this study was a 2x2x5 factorial design with repeated-measures on the last factor. Three-way ANOVA with repeated-measures was used to analyze time error in aquisition phase and two-way ANOVA was used to investigate the effect of learning in retention phase. In conclusion, it is suggested that the effects of KR-delay and post-KR-delay intervals may have effects on discrete motor task But, delay-interval may be different according to level of task, a sort and learning field. So, provide to appropriate time of delay-interval according to subjects' level of techniques and a sort of task would seem to be a major factor to be considered in learning field. It is also suggested that learning theory based on this study be more wieldy, need more the study of a variety this field.