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Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity

Published on: March 7, 2019

Physical activity questionnaire comprehension: lessons from cognitive interviews.

Andrea Altschuler¹, Teresa Picchi, Melissa Nelson

¹Division of Research, Kaiser Permanente Northern California, Oakland, CA 94612, USA.

Medicine and Science in Sports and Exercise

|January 8, 2009

Summary

Many people misunderstand physical activity (PA) intensity questions on surveys, leading to inaccurate data. Researchers need to improve PA questionnaires to better capture true physical activity behavior.

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Area of Science:

Health behavior research
Measurement science
Psychology

Background:

Accurate assessment of physical activity (PA) is crucial for public health research.
Self-report questionnaires are common tools for measuring PA, but are prone to measurement error.
Understanding cognitive processes in survey response is key to improving PA assessment.

Purpose of the Study:

To evaluate whether individuals interpret questions about physical activity (PA) behavior consistently with researchers' intentions.
To identify potential sources of misunderstanding in commonly used PA assessment questionnaires.

Main Methods:

Cognitive interviews were conducted with 40 adults (ages 45-65) using PA questionnaires from two large studies.
Verbal probing techniques were employed to explore participants' thought processes while completing the questionnaires.
Transcripts were analyzed using standard qualitative methods to identify interpretation discrepancies.

Main Results:

Respondents frequently interpreted "intensity" psychologically rather than in terms of physical exertion.
Perceived PA intensity often did not align with objective measures (e.g., MET values).
Participants overcounted activities, overestimated work-related PA, and viewed grouped activities as exhaustive lists.

Conclusions:

Significant discrepancies exist between participant understanding and researcher intent for PA questionnaire items.
Measurement error in self-reported PA can be reduced by addressing the cognitive aspects of questionnaire response.
Further research into the cognitive processes underlying PA self-reporting is warranted.