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Giovanni was watching the night sky on a clear evening in November. He noticed that sometimes when ...

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Giovanni was watching the night sky on a clear evening in November. He noticed that sometimes when ...

Giovanni was watching the night sky on a clear evening in November. He noticed that sometimes when he looked directly overhead he could detect a very faint star. A few minutes later, it seemed that the star had disappeared and then it "appeared" again. How would you describe the light from the star in this case?

▸ It produces a just noticeable difference.

▸ It produces a distal stimulus.

▸ It falls just below Giovanni's level for perceptual invariance.

▸ It is just at Giovanni's absolute threshold for light.

Textbook

Psychology: Themes and Variations

Edition: 5^th

Authors: Weiten, McCann

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