A Researcher Observes That the Mean Difference Between Two Conditions

question 22

Multiple Choice

A researcher observes that the mean difference between two conditions is 2.0 and the average variability in participants' scores is 4.0.The effect size,Cohen's d,for this experiment is _______.

• A)8.0
• B)4.0
• C)2.0
• D)0.5

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Definitions:

Face Validity

An attribute of a test, when the items on it resemble the characteristics associated with the concept being tested for.

Musical Enjoyment

The pleasure or satisfaction derived from listening to or engaging in music, influenced by personal, cultural, and psychological factors.

Questionnaire

A research instrument consisting of a series of questions for the purpose of gathering information from respondents.

Internal Consistency

The degree of reliability within a test—the extent to which different parts of the same test yield the same results.