Probability Sampling Researchers Should Sample Many Clusters and Obtain the Largest

question 41

Multiple Choice

Probability Sampling Researchers should sample many clusters and obtain the largest sample
Possible to control the problem of

• A)demand characteristics.
• B)experimenter bias.
• C)reactivity.
• D)subjects within clusters sharing similar economic status, education, ethnicity, and age.

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Definitions:

Perceptual Invariance

The ability to perceive the unchanging properties of objects (shape, size, brightness, color) despite variations in the sensory input.

Absolute Threshold

The smallest amount of stimulation needed for a stimulus to be detected by the senses 50% of the time.

Just Noticeable Difference

The minimum difference in stimulation that a person can detect 50% of the time.

Absolute Threshold

The minimum intensity of a stimulus that one can detect 50% of the time, a concept central to the study of sensory processes.