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Perceptual blocks are obstacles that prevent the problem-solver from clearly perceiving either the problem itself or the information needed to solve the problem.
Mainly six kinds:
1) Detecting what you expect--stereotyping
Stereotyping and labeling are extremely prevalent and effective perceptual blcoks, however, you cannot see clearly if you are controlled by preconceptions. Unfortunately, stereotyping is inherent in the working of the mind.
Conceptual blockbusting- chap2 perceptual blocks,布布扣,bubuko.com
Conceptual blockbusting- chap2 perceptual blocks
原文：http://www.cnblogs.com/littledot/p/3695134.html