Examlex
The purpose of purposive samples is to generalize.
Reinforcement
In behavioral psychology, a process by which the likelihood of a behavior's occurrence is increased through the addition of a stimulus following that behavior.
Primary Reinforcer
An innately valuable stimulus, such as food or drink, that satisfies a biological need and reinforces behaviors without prior learning.
Aversive Stimulus
An unpleasant or noxious stimulus used to elicit a response or to condition a behavior through negative reinforcement or punishment.
Secondary Reinforcer
An acquired reinforcing stimulus, which becomes effective through its link with a primary reinforcer.
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