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- In order to assess reproducibility, questionnaires are
administered twice to a group of individuals at 2 points in time. The goal of a
reproducibility study is to assess variation in questionnaire performance from one
administration to the next.- Short intervals (i.e., days or weeks)
between questionnaire administrations may lead to subjects simply remembering their
responses to the first administration and therefore artificially increase observed
reproducibility.
- Alternatively, long
intervals of time between questionnaire administrations (i.e., one year) may encompass
true changes in physical activity and lead to reduced reproducibility.
- One approach to address
these problems is to administer the questionnaire over both short as well as long
intervals of time to provide an estimate of both the lower as well as upper level of
reproducibility. |
