CAS PS 222 Chapter Notes - Chapter 6: Change Blindness, Inattentional Blindness, Mental Chronometry
10 Aug 2018
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Document Summary
Some aspects of the environment are more interesting or more important than others. There is too much incoming stimulation at the retina to process everything. By aiming the fovea at places we want to process more deeply. Through a mental process, by attending to some stimuli. Scanning a scene- eye movements can take in different parts of a scene: measuring eye movements-camera-based eye trackers show: Fixations- pauses in eye movements that indicate where a person is attending. What determines the location of a fixation: characteristics of the scene: Stimulus salience: areas of stimuli that attract attention due to their properties. Color, contrast, and orientation are relevant properties. Saliency maps show fixations are related to such properties in the initial scanning process (bottom-up) Scene schema: prior knowledge about what is found in typical scenes (top-down) Eye movements and fixations are closely linked to the action the person is about to take.
