عنوان مقاله [English]
Background & Purpose: The purpose of this study is to make a comparison of Influence of feedback after successful unsuccessful attempts on learning the skills needed for shot put on shoulder about the retarded boys in Ahwaz city.
Methodology: The statistical data includes the retarded boys with 9-12 years old, that 45 persons of this study were chosen by a available method. After process of pretest, they were placed randomly into three groups. To make analysis of data in process of pretest, the method of one way variance and in process of attainment, analyzing of multiplex variance via measurement on factor of blocks to determine the differences between intergroup and within- the -group is used.
Results: The results show, there is no much difference between the participants of all three groups in pretest (p=0.35). also result in the acquisition and retention of a significant difference between the three groups (P