Erickson and colleagues (2011)randomly assigned older adults to one of two activities: a gentle stretching condition or a more intense aerobic exercise condition.Because Erickson and colleagues randomly assigned participants to the activities and because they deliberately manipulated the activity,their investigation is an example of the _____ research method.

Question

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The study described involves manipulating an independent variable (the type of activity) and measuring its effects on a dependent variable (health outcomes for older adults). Because the participants were randomly assigned to each group, this is a true experiment.

Erickson and Colleagues (2011)randomly Assigned Older Adults to One of Two