Construct validity of the MOBAK-5 test instrument and determinants

Basic motor competencies are understood as functional performance dispositions that can be learned and retained in the long term. They ensure that students are qualified to participate in the culture of sport and exercise. Support for basic motor competencies plays an important role in the school subject physical education. In this article we present the operationalization of basic motor competencies for the fifth grade (MOBAK-5). In a validation study (= 438 children; 55% girls; M = 11.25 years, SD = 0.49), we tested the construct validity of the MOBAK-5 test instrument and identified determinants of basic motor competencies. We calculated an exploratory structural equation model (CFI = .99; RMSEA = .024) and a confirmatory factor analysis (CFI = .95; RMSEA = .041) with the eight MOBAK-5 test items. Both analyses confirm that the MOBAK-5 test instrument has the same two-factor structure with the factors self-movement and object movement as that found in previous studies for the analogously constructed MOBAK-1 and MOBAK-3 test instruments. We studied differential and determining influences on basic motor competencies by integrating covariates—gender, age, and BMI as well as frequency and type of physical activity outside school. Boys performed better on object movement, while girls performed better on self-movement. Age showed low significant influences. BMI was inversely related to the basic motor competencies, whereas physical activity outside school had an effect on the basic motor competencies. The confirmation of the two-factor structure and the correlations with external criteria provide initial evidence for the construct and criterion validity of the MOBAK-5 test instrument.

Herrmann, C. & Seelig, H. (2017). Basic motor competencies of fifth graders. Construct validity of the MOBAK-5 test instrument and determinants. German Journal of Exercise and Sport Research, 47 (2), 110–121.