The author presented descriptive statistics for 937 reliability coefficients for various reliability methods (e.g., alpha) and test types (e.g., intelligence). He compared the average reliability coefficients with the reliability standards that are suggested by experts and found that most average reliabilities were less than ideal. Correlations showed that over the past several decades there ha...

BACKGROUND Questionnaires are feasible instruments to assess physical activity (PA) in large samples. The aim of the current study was to evaluate the reliability and validity of the PAQ-A questionnaire in Spanish adolescents using the measurement of PA by accelerometer as criterion. METHODS In a sample of 82 adolescents, aged 12 to 17 years, 1-week PAQ-A test-retest was administered. Reliabi...

objective: the purpose of this study is to examine the factor structure, internal consistency, and construct validity of preschool, first and second grade versions of berkeley parenting self-efficacy scale. method: the subjects were 317 mothers: (102 mothers of preschool children, 111 mothers of first grade children and 104 mothers of second grade children) who were randomly selected from schoo...

background: child health questionnaire (chq) is one of the most widely used measures for health related quality of life. the present study examined the psychometrics characteristics of persian version of chq for students. methods: 800 primary and secondary school students were selected with multistage randomly sampling from state schools. the questionnaire was adapted employing the translation ...

the aim of this study was to determine the validity and reliability of the persian version of sport perfectionism scale of dun et al. (2006). to determine the construct validity of the questionnaire, 393 (230 male and 163 female) athletes with different skill levels (novice, non-elite and elite) in 10 team and individual sports were selected by random sampling method and then completed the ques...

success is satisfactory for any athlete. however, some athletes will face anxietyin novel circumstances and fear of future will prevent them from improving. fearof failure is accompanied with stress and adaptation to stress is the most importantissue for an effective decision. the aim of this study was to examine validity andreliability of performance failure appraisal inventory (pfai). for thi...

the aim of the present study was to determine psychometric properties of the persian version of the group conflict questionnaire in male and female athletes. for this purpose, 281 athletes at different skill levels in 25 team and individual sports were selected through cluster random sampling method and were asked to complete the persian version of this questionnaire. firstly, the accuracy of t...

Background: The health locus of control (HLC) can indirectly determine the health status. The current study aimed to assess the validity and reliability of Form C of the Multidimensional Health Locus of Control (MHLC-C) scale in pregnant women.Methods: 554 pregnant women participated in this cross-sectional study conducted in 2017; they referred to community health centers affiliated with Mashh...