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A contrast effect is the enhancement or diminishment, relative to normal, of perception, cognition or related performance as a result of successive (immediately previous) or simultaneous exposure to a stimulus of lesser or greater value in the same dimension. (Here, normal perception, cognition or performance is that which would be obtained in ...
Behavioral contrast refers to a change in the strength of one response that occurs when the rate of reward of a second response, or of the first response under different conditions, is changed. For example, suppose that a pigeon in an operant chamber pecks a key for food reward.
The A- and B-processes are consequently and temporarily linked but were believed to depend on different neurobiological mechanisms. [4] B-process, the other part of opponent-process theory, occurs after the initial shock, or emotion and is evoked after a short delay. [4]
For example, raised levels of dopamine may be a consequence rather than a cause of schizophrenia. Many psychologists criticise psychiatry for focusing its attention primarily on symptoms and for assuming that relieving symptoms with drugs cures the problem. Unfortunately, in many cases when the drug treatment is ceased the symptoms recur.
Depending on how the individual categorizes information, contrast effects can occur as well. The more specific or extreme the context stimuli were in comparison to the target stimulus, the more likely contrast effects were to occur. The term assimilation effect appears in the field of social comparison theory as well.
This contrast between the light and dark creates a sharper image. (Compare unsharp masking in digital processing). This mechanism also creates the Mach band visual effect. Visual lateral inhibition is the process in which photoreceptor cells aid the brain in perceiving contrast within an image.
A psychologists with the focus of health psychology would have a biopsychosocial model approach with patients. Forensic psychologists usually have a background in criminal justice and pursue a master's in forensic psychology. Clinical psychology can be pursued in education by a master's or a PsyD program to receive more research or academic ...
In perceptual psychology, a stimulus is an energy change (e.g., light or sound) which is registered by the senses (e.g., vision, hearing, taste, etc.) and constitutes the basis for perception. [2] In behavioral psychology (i.e., classical and operant conditioning), a stimulus constitutes the basis for behavior. [2]