The Effect Of PETTLEP Imagery Intervention On The Self-efficacy Of Provincial Basketball Female Youth Athletes-A Single-case Experimental Design Study

Imagery is one of the most widely-researched topics in sport psychology.Recent research has been focused on cognitive function of imagery and apply it to enhance sport performance.However,the motivation function of imagery needed to produce effects has been under-researched.The current study adopted the multiple-baseline single-case design to examine the different script imagery intervention effect of the sport self-efficacy for the 4basketball youth athletes.The whole intervention lasts for 22 weeks,comprising 4-7weeks baseline test,15-18 weeks formal intervention.The measures in this research include the Movement Imagery Questionnaire-Revised(MIQ-R),the Sport Imagery Questionnaire(SIQ),the Sport Self-efficacy Scale and imagery diary.After the end of formal intervention,the Practice Assessment Questionnaire was fulfilled by the four athletes and their two coaches,in order to evaluate the social validity.The results of the study showed that:(1)There was a significant improvement in training self-efficacy,competition self-efficacy and sport self-efficacy among three subjects.It showed that the PETTLEP imagery training promoted the improvement of self-efficacy level of athletes,and also emphasized the importance of the individuality of the imagery script;(2)PETTLEP imagery training improved the self-efficacy of the three subjects,which was better than the other two kinds of imagery training.PETTLEP imagery script included physical,environmental,timing,task,learning,emotional,and perspective elements,which made athletes produced a multiple-sensory and a sports-related emotional experience to promote self-efficacy.Therefore,the function equivalence of PETTLEP program was verified.;(3)Subjects in the whole stage of intervention relatively frequently applied the motivation function of imagery,especially the Motivational Specific(MS)and theMotivational General-Arousal(MG-A).The application of motivational imagery played an active role in improving athletes' self-efficacy.It also showed the effect of matching the function type with the expected target in the imagery training.(4)The evaluation results of the four subjects and the two coaches showed that the performance level of the three subjects was improved on different degree.Both PETTLEP and traditional imagery programs can improve athletic performance.