Sensation and Perception (GRE (Graduate Record Examinations) Psychology): Questions 20 - 22 of 25

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Question number: 20

» Sensation and Perception » Perceptual Organization

MCQ▾

Question

Perception differs from sensation in that

Choices

Choice (5) Response

a.

perception allows us to organize and interpret sensations

b.

perception is the raw data coming in from the senses

c.

neither perception or sensation can be measured

d.

sensation is an organizing and interpretive process; perception is not

e.

perception can be measured; sensations cannot

Question number: 21

» Sensation and Perception » Vision

MCQ▾

Question

Hermann von Helmholtz is, in part, famous for his theory of

Choices

Choice (5) Response

a.

tone deafness

b.

lateral inhibition

c.

color blindness

d.

color vision

e.

sensory transduction

Question number: 22

» Sensation and Perception » Psychophysics, Signal Detection

MCQ▾

Question

In a laboratory experiment, subjects wear headphones and are tested individually. Each of 500 subjects is presented first with a light and then possibly with a low-intensity tone in the earphones. Subjects are instructed to push a button if they hear a tone. Subjects are rewarded with $10 for each hit. In 500 trials, 200 times a tone was presented, and 300 times a tone was not presented. One hundred and ninety tones were detected. Also, the button was pressed 270 times in response to no tone.

Which of the following statements about the above experiment is in line with signal detection theory?

Choices

Choice (5) Response

a.

The reward for hits probably caused the high number of false alarms.

b.

The reward offered for hits increased subjects’ overall response accuracy.

c.

Subjects were unable to detect at least a few tones because some tones were not a just noticeable difference from the previously presented tones.

d.

Some subjects might have been distracted by the experiment design which called on visual and auditory sensory systems.

e.

The tone and the light were probably not effectively paired because the tone only followed the light in 200 of the 500 trails.

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