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ASSOCIATION NUCLEI

nuclei of the thalamus that does not receive direct input from the ascending sensory systems. These nuclei connect widely to

ASSOCIATIVE THINKING

an unconscious or uncontrolled cognitive activity in which the mind wanders

ASTIGMATISM

n. a visual disorder that occurs when the light rays of a visual stimulus do not all focus on a

ASYMPTOTE

n. 1. in statistics, a hypothetical straight line that a regular curve approaches but never reaches, as it approaches infinity.

ATAXIC GAIT

a wide-based, staggering gait, that is often seen in individuals with cerebellar damage, or ataxia.

ATOMISM

n. 1. the view that psychological phenomena can best be understood by dividing and then studying elementary units. Commonly seen

ATTENDANT CARE

1. nonmedical, in-home personal care provided to individuals with a physical or mental disability. Typically, these people can live independently

ATTENTIONAL FOCUS

the direction of an individual

ATTITUDE MEASURE

a procedure in which individuals' attitudes and responses are assigned quantitative values. Several broad categories of this type of measure

ATTRIBUTABLE RISK

in epidemiology, the incidence rate of a disease or disorder that can be considered to have been caused by exposure

ATYPICAL DISSOCIATIVE DISORDER

in the DSM-lll, this represented a category of dissociative disorders. In the DSM-IV-TR these are labeled dissociative disorder not otherwise

AUDIENCE

n. 1. a body of onlookers that observes some performance, event, or activity - may be real or perceived. Unlike

AUDITORY ABILITIES

refers to the abilities to encode and discriminate different sounds or tones. These abilities, according to some theories of intelligence

AUDITORY FLICKER

refers to sound presented as discrete units (with gaps) rather than as continuous noise. Fusion occurs when, despite the gaps,

AUDITORY STIMULUS

any stimulus capable of eliciting auditory sensation. This usually refers to a distinct airborne sound, but can also include vibration

AUSTRIAN SCHOOL

the theoretical developments in psychology associated principally with the universities of Vienna and Graz in Austria around the end of

AUTISTIC DISORDER

a behavioral syndrome of neurological dysfunction characterized by impaired reciprocal social interactions, impaired verbal and nonverbal communication, impoverished or diminished

AUTOCRINE

describing a type of cellular signal whereby a chemical messenger is secreted by a cell into its environment and feeds

AUTOMATED DESENSITIZATION

the use of devices like audiotapes, videotapes, and digitized media to mimic the presentation of anxiety-provoking and relaxing stimuli during

AUTOMATIC WRITING

the act of writing while one's attention is not focused - for example, writing without conscious awareness. This occurs during