The Effects of Contextual Interference with Judgment of Learning on the Accuracy of Topspin Strokes in Table Tennis

The current study investigates, the effect of the  contexual interfrence with judgment of learning on the accuracy topspin stroks table tennis. In this quasi-experimental study, 40 skilled male players  with mean age of 20.4 ± 2.48 were selected by convenience. They were divided into four groups blocked, randomised, blocked - judgment of learning, and randomised - judgment of learning. Subjects contributed in the pre-test phase,acquisition phase and Then, they participated in the retention test with different intervals of one, seven, and thirty days from the training session. Data were analysed using a one-way analysis of variance with repeated measures. The results did not show significant differences in these groups in the acquisition phase. But in terms of stroks accuracy the randomised - judgment of learning,randomised and blocked - judgment of learninggroups showed better performance than blocked group in the  3 phses of retention test. In fact, findings suggest  that judgment of learning affects interference or impairement of memory and performance;  In other words, when learners predict and judge their performance, they experience appropriate strategies to deal with their training conditions and can be considered as an effective factor in the progress of performance and learning.