PSY 102 Lecture 5: Week 7 - Sensation and Perception
13 Dec 2019
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Document Summary
Stimulus - physical energy; raw data about the outside world. Received by specialized receptor cells in eyes, ears, skin, nose, and tongue. Brain makes sense of the raw data. Influenced by knowledge of the world, expectations, context. Inattentional blindness - we are blind to things we are not focused on; shows that perception depends on attention. Attention is filtered we focus selectively on some things while largely ignoring others. Mental resources are limited so we make choices about which parts of the environment to process more deeply. Dichotic listening - two different messages presented simultaneously we can only focus on one. A light source emits electromagnetic radiation that travels as a wave. Wavelength = 1 nanometer (nm) = one billionth of a meter. A tiny range of possible wavelengths is visible as light, and within that range is. Colour or hue - subjective perception of wavelength. Pupil - regulates the amount of light passing into the eye.
