PSYC 251 Study Guide - Midterm Guide: Premotor Cortex, Motor Planning, Motor Goal
5 Nov 2016
School
Department
Course
Professor
Document Summary
Topic 3: perception - bottom-up and top-down influences. Depends on the proximal stimulus and genetic hard-wiring of sensory systems. Involves low-level-processing intermediate high-level processing to determine what something is based on information given form the stimulus. Top-down - driven by goals and expectations, feedback connections. Depends on past experience, internal state, and environmental context. We perceive the world in a way that is most likely" based on our past experiences. Perception depends on both types of processing! Interactive activation theory: mcclelland and rumelhart - model of letter and word perception; integrates bottom-up and top-down processes. Knowledge of a word helps interpret what letters are in it (rather than the other way around). Features letters words = bottom-up processing uses feature detectors; features excite or inhibit letters, letters compete with other letters and excite or inhibit words. Words letters features = tyop-down processing; words compete with other words and excite letters.
