Main Article Content
This research is a Quasi Experimental Research. The purpose was to study and compare the
effect of over-hand training program with self-talk and concentration affecting volleyball serving
accuracy between Control Group and Experimental Group. The samples were male volleyball players
of the Thailand National Sports University, Chiang Mai Campus: 30 persons, divided into control group
and experimental group, 15 persons each for 8 weeks and taking the test before and after the 4th, 6th
and 8th weeks of training. The research used in the study was over-hand serve training program with
self-talk and concentration affecting volleyball serving accuracy and the ball-serving accuracy test. The
over-hand data were analyzed using mean (), standard deviation (S.D.), One-Way ANOVA, repeated
measurement and independent t-test.
It was found that the results of the test for the accuracy of the over-hand of the experimental
group; the mean scores before training were 18.33 points. After the 4th, 6th and 8th weeks of training,
the mean was 24.13, 26.33 and 30.33 points, respectively. The athletes had higher over-hand service
skills after training than before training and the results of the comparison of the accuracy of over-hand
serve between the control group and the experimental group showed that before training the control
group and the experimental group were not different. After the 4th, 6th and 8th weeks of training, the
control and experimental groups were significantly different at the .01 level, with the test statistical
values of 4.208, 4.631 and 4.832, respectively. So it can be concluded that effect of over-hand training
program with self-talk and concentration affecting volleyball serving accuracy could increase overhand
serve accuracy of male volleyball players, Thailand National Sports University, Chiang Mai
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