Sensation and Perception-Psychophysics, Signal Detection (GRE Psychology): Questions 1 - 4 of 5

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Question number: 1

» 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 describes the subjects’ overall performance?

Choices

Choice (4) Response
a.

460 hits

b.

10 misses and 30 false alarms

c.

10 misses and 30 correct rejections

d.

280 misses

Question number: 2

» Sensation and Perception » Psychophysics, Signal Detection

MCQ▾

Question

Which of the following explains why cartoons are not perceived as a series of still frames?

Choices

Choice (4) Response
a.

The Phi phenomenon

b.

Motion parallax

c.

Autokinetic effect

d.

The Muller-Lyer illusion

Question number: 3

» Sensation and Perception » Psychophysics, Signal Detection

MCQ▾

Question

Weber’s law applies to a specific range of intensities in

Choices

Choice (4) Response
a.
  1. hearing only
b.
  1. all of the sense organs
c.
  1. vision only
d.
  1. hearing and vision only

Question number: 4

» 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 (4) Response
a.

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

b.

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

c.

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

d.

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

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