Perceptual constancy is a false perception of reality caused by a tendency to misinterpret stimuli.
a. true
b. false

It is false that perceptual constancy is a false perception of reality caused by a tendency to misinterpret stimuli. That is actually the definition for illusion. 

Perceptual constancy is a visual phenomenon that represents the ability to experience a stable perception as sensory input changes.

the answer to this question is d

disorders of the brain include both behavior disorders and other psychiatric illnesses. the primary difference between a behavior disorder and another type of psychiatric disorder is the presence of choice. psychiatric conditions are considered to be involuntary while in behavior disorders, choices are essential.