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Module 12 notes

Module 12 notes - Chapter 12 Introduction to Sensation and...

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Chapter 12- Introduction to Sensation and Perception Sensation – the process by which our sensory receptors and nervous system receive and represent stimulus energies from our environment. Perception- the process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and events Bottom-up processing- analysis that begins with the sensory receptors and works up to the brains integration of sensory information Top-down processing- information processing guided by higher-level mental processes, as when we construct perceptions drawing on our experience and expectations. Psychophysics- the study of relationships between the physical characteristics of stimuli, such as their intensity, and our psychological experience of them Absolute threshold- the minimum stimulation needed to detect a particular stimulus 50 percent of the time Signal detection theory- a theory predicting how and when we detect the presence of a faint stimulus (signal) amid background stimulation (noise). Assumes there is no single
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