Related Experiment Video
Updated: Aug 19, 2026

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity
Published on: March 7, 2019
Examination of the factor structure of physical activity behaviors
J J Prochaska1, J F Sallis, J A Sarkin
1Joint Doctoral Program in Clinical Psychology, San Diego State University and the University of California at San Diego, San Diego, CA 92120, USA. prochask@sunstroke.sdsu.edu
Abstract:
Multiple physical activity recommendations exist for behaviors that vary in type and intensity (e.g., vigorous physical activity, strengthening exercises, moderate physical activity). The present study examined underlying dimensions of physical activity behaviors and determined the extent to which factors correspond to national health recommendations. Fifteen variables were drawn from six self-report measures and subjected to factor analysis with quartimax rotation. Participants were 547 university seniors (56% female; 60% Caucasian; mean age = 25 years). TV watching, the only index of sedentary behavior, did not load highly with other items, and was analyzed separately. Three interpretable factors were found: variables related to vigorous physical activity loaded highly on Factor 1; flexibility and strengthening items loaded highly on Factor 2; and moderate and housework activity loaded highly on Factor 3. Factors corresponded closely to national recommendations. Unweighted factor scores and TV watching correlated significantly with physiological indicators of fitness, supporting construct validity.
Related Concept Videos
Factorial Design
Factors Affecting Illness
For instance, risk factors are connected to illness, disability,...
Data Collection III
The principles to begin the physical assessment include conducting a comprehensive or problem-related history in a quiet, well-lit room, emphasizing privacy and comfort for the patient.
Five-Factor Theory of Personality
Openness reflects creativity, curiosity, and openness to new experiences. Individuals scoring high in openness are imaginative, have a wide range of interests, and are independent thinkers. Low...
Self-Report Tests of Personality
Factors Influencing Attraction II: Physical Attraction

