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Erickson and colleagues (2011) randomly assigned older adults to one of two activities: a gentle stretching condition, or a more intense aerobic exercise condition. The subjects in the gentle stretching group experienced _____ compared with subjects in the aerobic exercise condition.

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Answer: Independent variable.

Explanation:

An independent variable is controlled by Erickson and colleagues during this experiment. They can change the exercise at any time and control the course of the experiment. The exercise experience can be manipulated by using the independent variable.

Independent variables are used in 3 different ways, such as:

  1. Statistical modeling
  2. Experimental sciences
  3. Mathematical modeling

The difference between independent and dependent is that one can be manipulated (independent) and the other has the expectation of changes.

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