Psychology 3041/6014 Spring, 2014 1 of 2 BOTTOM-UP VS. TOP-DOWN PERCEPTUAL PROCESSES More frameworks, concepts to help sort and organize the rest of the semester… A key distinction is whether a teory, a process, a model uses or assumes or is a bottom-up process or a top-down process. 1. Bottom-up (data-driven): Perceptual processes that start with features provided by receptors Examples: Example of functioning: Types of bottom-up “strategies”: Feature extraction Recognition by components Computational approaches Note: All perception has at least some bottom-up processes. Why? What are geons?Psychology 3041/6014 Spring, 2014 2 of 2 2. Top-down processing Also, conceptually-driven processes Voluntarily engaged, higher, global, abstract analysis that influences the operation of lower processes Some “higher” aspects that can shape perception: Examples of these affecting sensation or perception… 3. BOTH
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