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A

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A way of designating a sequence of phases in an experiment. The first condition is assigned the label of A, and each different condition is given a new letter. The first condition is often a control condition, but A can also refer to an experimental condition if it comes first.
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Viewing behavior (B) as a function of its consequences (C) and its antecedents (A). 2 (Sulzer Note. Numerals indicate the chapter(s) in which the term was introduced.
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Behavior that is not typically observed, or is out of the ordinary or unusual. This term is relativistic in nature and refers to groups of individuals, and may pertain to specific subpopulations such as "individuals with mental retardation."
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The horizontal line of a graph, used to record the time that behavior occurred.
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The horizontal or x-axis on a graph. In applied behavior analysis, the abscissa usually depicts successive trials or the passage of time, such as days.
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A unit of measurement whose value is defined in a fixed or unvarying manner independently of the phenomenon being measured.
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Sometimes the property of the stimulus which controls an operant performance may not be found in any single instance of the stimulus. When such is the case the control may be through an abstract property of the stimulus, such as its shape, position or size. In each of these cases, the controlling property of the stimulus is found in a class of stimuli, and reinforcement is determined by a general rule rather than a specific form of the stimulus.
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Discrimination based on a single property of stimuli, independent of other properties; thus, generalization among all stimuli with that property (e.g., all red stimuli as Opposed to specific red objects). Cf. CONCEPT FORMATION.
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A non-technical term which describes an organism whose performances are occurring at a low frequency because the number of performances required for reinforcement is too high. It is defined as the state of an organism in which there is a loss of will power; there is an inability to act or to make decisions. The term usually refers to a performance which occurs at a low rate as a result of its schedule of reinforcement.
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In the metaphor of memory storage and retrieval, the retrievability of a stored item; an item that is stored but not retrievable is said to be inaccessible. Cf. AVAILABILITY.

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