If Researchers Are Interested in the Average Time It Takes

question 147

Multiple Choice

If researchers are interested in the average time it takes to press a button when a green light flashes on a screen,and they simply measure the reaction times of volunteers who sign up for the study,what rationale would the researchers give for not using random sampling?

• A)Sometimes generality does not matter.
• B)Sometimes generality cannot be determined.
• C)Sometimes generality can be determined.
• D)Sometimes generality can be assumed.

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Definitions:

Jnd

Stands for Just Noticeable Difference, the minimal change in a stimulus that can just barely be detected by an organism.

Weber Fraction

A concept in psychophysics that describes the proportionate relationship between the magnitude of a physical stimulus and its perceptible increment needed to detect a difference.

Psychological Magnitude

The perceived size, intensity, or importance of a psychological process or stimulus, often related to how individuals assess and experience various psychological phenomena.

Physical Intensity

The magnitude or strength of a physical quantity or phenomena, such as light, sound, or exercise.