PSYCH 100 Lecture Notes - Lecture 2: Loch Ness Monster, Subliminal Stimuli, Detection Theory
Document Summary
Blind persons sensations are normal, but perception is not normal. Bottom-up processing sensory analysis that begins at entry level. Information flowing from the sensory receptors to the brain. Top-down processing - information processing guided by high-level mental processes: construct perceptions by filtering information through our experience and expectations. All our senses: receive sensory stimulation using specialized receptor cells, transform that stimulation into neural impulses, deliver the neural information to our brain. Process of the steps^ - transduction: conversion of one form of energy into another, distortion, vision: light energy, hearing: air waves. Signal detection theory predicts how and when we will detect a faint stimulus (signal) amid background stimulation (noise: vary depending upon, strength of signal, our experience, expectations, motivation, alertness. Intensity amount of energy in a light wave or sound wave, which influences what we perceive as brightness or loudness: amplitude the height from peak to trough (top to bottom)
