Vali Ollah Kashani; Mansoureh Mokaberian; Elahe Mostafaifar
Abstract
Mindfulness is a cognitive process during which the mindful persons focus their attention to experience feelings and incidents happening in the present moment within or around themselves. The aim of this study was to determine validity and reliability of the Persian version of Mindfulness Inventory ...
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Mindfulness is a cognitive process during which the mindful persons focus their attention to experience feelings and incidents happening in the present moment within or around themselves. The aim of this study was to determine validity and reliability of the Persian version of Mindfulness Inventory for Sport. For this purpose, 150 athletes with different levels of skills in 7 sport fields, individual and team, were selected by cluster random sampling method and completed the Persian version of this inventory. The method of the research was as follows: firstly, using translation-back translation method, translate accuracy of the Persian version of this inventory was confirmed. Confirmatory factor analysis based on structural equation modeling was used to determine construct validity of this Persian version. Cronbach alpha coefficient was used to determine internal consistency and intra-class correlation coefficient under test-retest method was used to study temporal reliability of items. The results showed that first-order (RMSEA=0.042, CFI=0.97 and TLI=0.96) and second-order (RMSEA=0.042, CFI=0.97 and TLI=0.96) confirmatory factor analyses, Cronbach alpha coefficients (ɑ=0.79) and intra-class correlation (0.85) of the Persian version of Mindfulness Inventory for Sport supported 3-factor and 15-item structure of this inventory and confirmed validity and reliability of this inventory.
Ahmad Nikravan; Valiollah Kashani; Elahe Mostafaifar
Abstract
This study aimed at investigating the effect of sleep deprivation and retroactive interference on offline learning in tennis simulated game. Based on the questionnaires related to the variables under study, 50 female students of Semnan University (age range 19-25 years) were selected as the sample ...
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This study aimed at investigating the effect of sleep deprivation and retroactive interference on offline learning in tennis simulated game. Based on the questionnaires related to the variables under study, 50 female students of Semnan University (age range 19-25 years) were selected as the sample and divided into 5 groups: perfect sleep, sleep deprivation, perfect sleep and retroactive interference, sleep deprivation and retroactive intervention and training with rest interval less than 1 hour. A tennis simulated game (with rules and scoring similar to a real game) was performed to measure offline learning. One-way ANOVA and ANOVA with repeated measures were used for inferential statistics at a significance level (P≤0.05). The results showed that the differences in offline learning (Sig=0.001) and retention scores (Sig=0.001) were significant among the research groups. In those groups with sufficient rest intervals between each two sessions and full rest, the level of their performance was higher in the next day than the previous day. Opposite effects were observed with sleep deprivation and retroactive interference. Therefore, those who are learning a skill should pay attention to their daily activities and sleep patterns to prevent a disruption to skill learning and to take advantage of their practices.
