perception - 1 Psyc 001 Introduction to Psychology...

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Unformatted text preview: 1 Psyc 001 Introduction to Psychology Perception Sensation ¡ The detection of physical energy emitted or reflected by physical objects. ¡ It occurs when energy in the external environment or the body stimulates receptors in the sense organs. Sensation: Absolute Threshold ¡ The point where you can tell the stimulus is there vs. not there 50% of the time 2 Sensation: Difference Threshold ¡ The smallest change in the stimulus that is just detectable 50% of the time Transduction ¡ The process of taking incoming physical energy (sound, light, heat) and converting it into neural activity. Perception ¡ The process by which the brain organizes and attaches meaning to sensory information. 3 Perception: The Constant Search for Meaning The Stroop Test: Baseline ¡ As quickly as you can move down the first column and then the second column naming the color of the ink of each oval. The Stroop Test: Test Condition ¡ As quickly as you can move down the first column and then the second column naming the color of the ink of each word. 4 Perception depends on sensory messages and on expectations ¡ Bottom-up processing: Controlled by physical messages delivered to the senses ¡ Top-down processing: Controlled by one’s beliefs, expectations about the world...
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perception - 1 Psyc 001 Introduction to Psychology...

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