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A PRIORI

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

Latin for prior to- independent and not being based on any previous study-

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A PRIORI TEST

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

the testing of an experiment's hypotheses prior to the actual performance of said experiment.

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A SEARCH

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

pronounced A Star- a form of best-first algorithms that determines the distance between a specific point and am original starting point, combined with heuristic totalities predicting the quality of the specific point being measured.

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A-B DESIGN

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

a setup for experiments requiring the measurement of the dependent variable prior to onset of the experiment and again after it.

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A-BETA FIBER

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

transmitters that quickly convey data from skin-based receptors to the central nervous system- myleinated fibers, largest in size of all peripheral nerve fibers.

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A-DELTA FIBER

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

a medullae axon, of reasonably big dimension, transferring ache or temperature reports to the neurological system.

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ABC THEORY

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

a theory based on the RET approach developed in 1955 by Albert Ellis, proposing that Activating events are not the cause of Consequences, but rather that a person's Beliefs are, hence the ABC terminology

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ABDOMINAL MIGRAINE

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

common in kids, repeating discomfort in the abdomen- queasiness and vomiting may or may not occur concurrently with abdominal migraine- episodes occur and then flee, to return again after periods of optimal health and well-being.

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ABDUCENS NERVE

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

commonly referred to as the cranial nerve VI, this nerve houses small threads that obtain control over the lateral rectus muscle in the eyes.

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ABDUCENS NUCLEUS

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

starting point of the abducens nerve- a compilation of nerve cells in the base of the 4th ventricle in the brain.

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