PSYC 2390 Chapter Notes - Chapter 1: Visual Search, Gustav Fechner, Sensory System
27 Jan 2015
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Refer to figure 1. 1 in text on page 5: (1) environmental stimulus (2) light is reflected and transformed (3) receptor processes (4) If optics are working properly they form a sharp image of the object on the receptors of the person"s retina. These stimuli are the starting point for perception : top-down processing (also called knowledge-based processing) refers to processing that is based on knowledge. She starts with the patterns that the doctors handwriting creates on her retina. Once these bottom-up data have triggered the sequence of steps of the perceptual process, top-down processing can come into play as well. Results showed that horizontal and vertical lines (stimuli) resulted in better detail vision (behavioural response) than slanted lines. Christopher furmanski: human subject"s brain activity was measured in a brain canner while they carried out a task that involved detecting line with different orientations.
