Comparison of the Effect of number of stimulus-response and Stimulus Onset Asynchrony two stimuli on the Psychological refractory period in athletes and non-athletes

One of the topics that is important in many sports skills is the Psychological refractory period that is a delay in responding to stimuli that are presented in short intervals. The aim of recent research is the effect of number of simulation-response and Stimulus Onset Asynchrony on Psychological refractory period in athlete and non- athlete person.

This research is a semi-experiment and field of fundamental-applied research. 15 athletes and 15 non-athlete students of university (22.25±1.08 years) were selected by convenience targeted sampling. The instrument was Serial Reaction Time Measuring Apparatus, msi notebook and Annett Hand Preference Questionnaire. From all participants, task test the taken using a psychological refractory period included the number of different response stimuli (one, two, four and eight) for the first and second stimuli and four time intervals (100,200,400 and 600 milliseconds) between the two stimuli. data using analysis of oneway variance tests of 4×4×2 with repeated measures with Bonferroni test were used.

The results showed that at more time intervals and in the number of stimuli-less responses, there was a shorter psychological refractory period. Also, there is a significant difference between the athletes and non-athletes in the number of stimulus-response eight-choice.

It seems that in more number of stimulus-responses, according to Welfard's single-channel theory, because the later channel is empty, a longer Psychological refractory period occurs. Athletes, due to the experience of more challenges in exercise and the Preparation neuropsychology muscular system, in more difficult tasks, they perform better than non-athletes.