After learning that her new college roommate had experienced several episodes of depression during her high school years,Erin ly perceived her roommate's laughter as artificial and phony. This best illustrates the impact of

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Perceptual set refers to a mental predisposition to perceive one thing and not another. Erin's prior knowledge about her roommate's depression influenced her perception of her roommate's laughter, causing her to interpret it as artificial and phony.

After Learning That Her New College Roommate Had Experienced Several