What is meant by selective attrition?
a. Some participants fail to answer all the questions on a survey
b. Some participants respond to demand characteristics, and others don't.
c. Those who volunteer for a study may be unrepresentative of the population.
d. Some participants quit before the study finishes.
d
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Clark and Whitall distinguish four historical periods of motor development. In order, they are
A. precursor period, normative/descriptive period, maturational period, process-oriented period B. precursor period, maturational period, normative/descriptive period, process-oriented period C. precursor period, normative/descriptive period, process-oriented period, maturational period D. normative/descriptive period, precursor period, maturational period, process-oriented period
According to the criteria outlined by Davison et al. in their definition of abnormality, which of the following is not part of the definition?
a) Whether the behaviour violates social norms b) Whether the behaviour causes personal distress c) Whether the behaviour reflects a past history of abnormal behaviour d) None of the above