Stimulus control

In behavioral psychology, stimulus control is a phenomenon that occurs when an organism behaves in one way in the presence of a given stimulus and another way in its absence. Any stimulus that modifies behavior in this manner is referred to as a discriminative stimulus. Stimulus control of behavior occurs when the performance of a particular behavior is controlled by the presence or absence of a discriminative stimulus. For example, the presence of a stop sign (a discriminative stimulus) at a traffic intersection increases the probability that 'braking' behavior will occur. In behavioral psychology, stimulus control is a phenomenon that occurs when an organism behaves in one way in the presence of a given stimulus and another way in its absence. Any stimulus that modifies behavior in this manner is referred to as a discriminative stimulus. Stimulus control of behavior occurs when the performance of a particular behavior is controlled by the presence or absence of a discriminative stimulus. For example, the presence of a stop sign (a discriminative stimulus) at a traffic intersection increases the probability that 'braking' behavior will occur. Some theorists believe that all behavior is under some form of stimulus control. For example, in the analysis of B. F. Skinner, verbal behavior is a complicated assortment of behaviors with a variety of controlling stimuli. The controlling effects of stimuli are seen in quite diverse situations and in many aspects of behavior. For example, a stimulus presented at one time may control responses emitted immediately or at a later time; two stimuli may control the same behavior; a single stimulus may trigger behavior A at one time and behavior B at another; a stimulus may control behavior only in the presence of another stimulus, and so on. These sorts of control are brought about by a variety of methods and they play a large role in systematic accounts of behavioral processes.