Physical activity questionnaire comprehension: lessons from cognitive interviews.
Physical activity questionnaire comprehension: lessons from cognitive interviews.
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DOI：
10.1249/mss.0b013e318186b1b1
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发表时间：
2009-02
影响因子：
4.1
通讯作者：
Sternfeld B
中科院分区：
文献类型：
--
作者：
Altschuler A;Picchi T;Nelson M;Rogers JD;Hart J;Sternfeld B
为了确定受访者是否与研究人员对评估日常体育活动行为中经常使用的概念和问题的理解相同。作为一项旨在减少自我报告体力活动(PA)测量误差的研究的一部分，我们对年龄在45-65岁之间的19名男性和21名女性进行了认知访谈，了解他们对两项基于人群的大型研究--LACE(癌症后生活流行病学)和CMH(加州男性健康研究)中使用的PA问卷的反应。其中一份问卷询问了过去12个月在几个不同领域中一系列特定活动的频率、持续时间和可感知的强度。第二份问卷询问过去3个月内按强度(即中度或剧烈)分组的具体活动(主要是娱乐活动)的频率和持续时间。我们使用言语探查技术，让受访者在完成调查问卷时描述他们的思维过程。所有采访都被录音和转录，然后用标准的定性方法分析成绩单。认知访谈显示，相当多的受访者将“强度”理解为情绪或心理强度，而不是体力。因此，参与者报告的特定活动的感知强度通常与该活动的MET值几乎没有关系。此外，参与者经常多次计算同一活动，高估了与工作相关的PA，并理解了被归入单一类别的活动，这些活动被归类为确定的列表，而不是例子。认知采访显示，受访者对一些体力活动问题的解释与研究人员关于这些问题旨在衡量什么的假设之间存在显著差异。通过关注回答PA问卷所需的认知过程的额外研究，可以最大限度地减少自我报告PA中的一些测量误差来源。
To determine if respondents share researchers’ understandings of concepts and questions frequently used in the assessment of usual physical activity behavior. As part of On the Move, a study aimed at reducing measurement error in self-reported physical activity (PA), we conducted cognitive interviews with 19 men and 21 women, ages 45-65, regarding their responses to the PA questionnaires used in two large, population-based studies, LACE (Life After Cancer Epidemiology) and CMH (California Men’s Health Study). One questionnaire asks about the frequency, duration, and perceived intensity of a range of specific activities in several different domains over the past 12 months. The second questionnaire asks about frequency and duration of specific, mostly recreational activities, grouped by intensity (i.e., moderate or vigorous) over the past 3 months. We used verbal probing techniques to allow respondents to describe their thought processes as they completed the questionnaires. All interviews were tape-recorded and transcribed, and the transcripts were then analyzed using standard qualitative methods. Cognitive interviews demonstrated that a sizable number of respondents understood “intensity” in terms of emotional or psychological intensity, rather than physical effort. As a result, the perceived intensity with which a participant reported doing a specific activity often bore little relationship to the MET value of that activity. Additionally, participants often counted the same activity more than once, overestimated work-related PA, and understood activities that were grouped together in a single category to be definitive lists rather than examples. Cognitive interviews revealed significant gaps between respondents’ interpretations of some physical activity questions and researchers’ assumptions about what those questions were intended to measure. Some sources of measurement error in self-reported PA may be minimized by additional research that focuses on the cognitive processes required to respond to PA questionnaires.