Background: Self-report questionnaires play an important role as outcome measures in shoulder research. Having an estimate of the measurement error of these ...
1 NSW Centre for the Advancement of Adolescent Health, Department of Paediatrics and Child Health, University of Sydney at The Children's Hospital at Westmead, New South Wales, Australia 2 Physical ...
There is a distinction that one learns about on the first day of a course in psychological research methods. It is the difference between internal and external validity. Internal validity is ...
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