Copy of Goldstein Chpt 1.

Copy of Goldstein Chpt 1. - Absolute threshold Action...

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Absolute threshold See Threshold, absolute. Action Motor activities such as moving the head or eyes and locomoting through the environment. Action is one of the major outcomes of the perceptual process. Adjustment, method of A psychophysical method in which the experimenter or the observer adjusts the stimulus intensity in a continuous manner until the observer detects the stimulus. Agnosia The inability to recognize objects. Attended stimulus The stimulus that is being attended by a person at a given point in time. Bottom-up processing Processing in which a person constructs a perception by analyzing the information falling on the receptors. Also called data-based processing. Classical psychophysical methods The methods of limits, adjustment, and constant stimuli, described by Fechner that are used for measuring thresholds. Cognitive influences on perception How the knowledge, memories, and expectations that a person brings to a situation influence his or her perception. Constant stimuli, method of A psychophysical method in which a number of stimuli with different intensities are presented repeatedly in a random order. Data-based processing Another name for bottom-up processing. Refers to processing that is based on incoming data, as opposed to top-down, or knowledge-based, processing, which is based on prior knowledge. Difference threshold See Threshold, difference. Environmental stimulus All of the things in our environment that we can potentially perceive at a given point in time. Knowledge
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This note was uploaded on 08/18/2008 for the course PSYC 325 taught by Professor Forster during the Spring '07 term at University of Arizona- Tucson.

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Copy of Goldstein Chpt 1. - Absolute threshold Action...

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