Validity and reliability of a self-report instrument to assess social support and physical environmental correlates of physical activity in adolescents.

ABSTRACT:

Background

The purpose of this study was to examine the internal consistency, test-retest reliability, construct validity and predictive validity of a new German self-report instrument to assess the influence of social support and the physical environment on physical activity in adolescents.

Methods

Based on theoretical consideration, the short scales on social support and physical environment were developed and cross-validated in two independent study samples of 9 to 17 year-old girls and boys. The longitudinal sample of Study I (n = 196) was recruited from a German comprehensive school, and subjects in this study completed the questionnaire twice with a between-test interval of seven days. Cronbach's alphas were computed to determine the internal consistency of the factors

SUBMITTER: Reimers AK 

PROVIDER: S-EPMC3489617 | biostudies-literature | 2012 Aug

REPOSITORIES: biostudies-literature