Glossary P

Principle of inclusiveness refers to the tendency to perceive only the larger figure when a smaller figure is embedded in a larger figure.

Principle of proximity refers to the tendency to perceptually group together stimuli that are physically close.

Principle of public events means seeking the causes of behavior in environmental events. The problem with using private events to explain behavior is that you still must explain the private events.

Principle of similarity refers to the tendency to perceive as units stimuli that are physically similar to one another.

Principle of single-subject experiments is to expose the same person to the baseline and treatment.

Principle of size states that the more worthwhile the amount of a reinforcer, the more effective the reinforcer. The question "Was the amount of reinforcement worthwhile?" should be asked to decide whether the principle has been followed

Principle of synchrony refers to a modern principle of perceptual organization that states that visual events that occur at the same time will be perceived as belonging together.

Principle of the heterogony of ends is a principle which according to Wundt is the fact that goal-directed activity usually causes experiences that modify the original motivational pattern.