In a Psychophysical Experiment, Observers First View a Display in Which

question 48

Multiple Choice

In a psychophysical experiment, observers first view a display in which small dots on a computer screen all move steadily toward the right. They then view a second stimulus in which they have to determine whether a patch of dots is stationary or moving. Based on your text's discussion and your knowledge of psychophysics, you might predict that the first display would:

• A)decrease observers' absolute threshold for motion detection
• B)increase observers' absolute threshold for motion detection
• C)have little or no effect on observers' absolute threshold for motion detection
• D)decrease observers' difference threshold for motion detection