TY  - JOUR
A1  - Kahlert, Daniela
A1  - Brand, Ralf
T1  - Questionnaires for assessing physical activity different response scale categories influence responses concerning health- and sport-related cognitions
JF  - Zeitschrift für Gesundheitspsychologie
N2  - The present study examines whether the use of different frequency scales in questionnaires about physical activity influences respondents' own estimation of their activity, as well as subsequent measurements of health- und sport-related cognitions and evaluations. Using a randomized research design we recruited a sample of 118 participants. One group received a high frequency scale for assessing their exercise frequency with the response categories "never", "less often", "once a month", "once a week", or "most days." The other group answered with a medium frequency scale with the alternatives "never", "less often", " once every few months", "once a month", and " once a week or more often." As dependent variables all participants judged the subjective importance of physical activity and their health-related quality of life (WHO-QOL-bref). Results indicate the expected response errors, owing to the fact that using a high-frequency scale produces higher levels of self-reported physical activity (Cramer's V = .30). Corresponding to this the subjective importance of physical activity increased (d = .37) and the health-related quality of life was judged to be better (d = .36). Such artefacts might be eliminated by using standardized formulations such as "I exercise... times per week/month for... minutes."
KW  - physical activity
KW  - measurement
KW  - health-related cognition
KW  - response error
Y1  - 2011
U6  - https://doi.org/10.1026/0943-8149/a000044
SN  - 0943-8149
VL  - 19
IS  - 2
SP  - 96
EP  - 100
PB  - Hogrefe
CY  - Göttingen
ER  - 
TY  - JOUR
A1  - Kahlert, Daniela
A1  - Brand, Ralf
T1  - Comparing self-report and accelerometry data a contribution to the validation of the MoMo-Physical activity questionnaire for children and adolescents
JF  - Deutsche Zeitschrift für Sportmedizin : offizielles Organ der Deutschen Gesellschaft für Sportmedizin und Prävention (Deutscher Sportärztebund) e.V. (DGSP) und Weiterbildungsorgan der Österreichischen Gesellschaft für Sportmedizin und Prävention
N2  - According to the results of the German Health Interview and Examination Survey for Children and Adolescents (KiGGS) published in 2009, only 5% to 8% of the 15-17-year-old adolescents reach the current recommendations on health-enhancing physical activity This result (besides others in the survey) rests on data measured with the 25-item physical activity questionnaire for children and adolescents (MoMo-AFB). The present study compares two different methods of assessing physical activity with the purpose of testing the validity of the MoMo-AFB self-report. First, we measured the physical activity status of 73 15 to 18-year-old pupils (32 boys and 41 girls) over seven days via objective accelerometry (ActiGraph GT1M), then the pupils completed the MoMo-AFB for the same (previous) period. Results show that using the MoMo-AFB leads to higher levels of self-reported physical activity than measuring it with accelerometers. Furthermore, only the MoMo-AFB subscale MVPA (moderate-to-vigorous physical activity), that uses two single items to decide whether the health-enhancing physical activity recommendation is reached or failed, corresponds statistically significantly with the accelerometry data. For all other subscales (e.g. school- or leisure time activity), we found no agreement. Further research, first of all on the measurement quality of the MoMo-AFB but also on the physical (in)activity status of children and adolescents, is needed.
KW  - Physical activity
KW  - means of measurement
KW  - physical activity questionnaires
KW  - accelerometry
KW  - adolescents
Y1  - 2011
SN  - 0344-5925
VL  - 62
IS  - 2
SP  - 36
EP  - +
PB  - WWF-Verl.-Ges.
CY  - Greven
ER  -