Chapter 6 - Chapter 6 8 9 13 14 Chapter 6 Sensation and...

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Chapter 6, 8, 9, 13, 14 Chapter 6 Sensation and Perception: Sensation: Receiving a stimulus in environment & connecting in neural signal Perception: how we interpret this info Two sets of processes 1. Bottom-up Processing: Taking the stimulus & making sense of it Process based on stimuli, not psychological processes 2. Top-Down Processing: Guided by cognition Info processing guided by higher-level mental process drawing on our experience and expectation Our mental processes influences how we perceive stimuli Sensation Suits an organisms needs o Ex/ Frogs & flying insects (only see fast moving things) / Human (hear verbal tones ) At which point can we sense different stimuli? o Psychophysics: study of diff stimuli & how we can experience them o Absolute Threshold(AT): where you can detect something stimulation needed to recognize the stimulus ½ the time o Subliminal Threshold: when stimulus are below AT for consciousness and awareness Priming – effects are minor o Weber’s Law’s: states how much a stimuli needs to change before the change is noticed JND (Just noticeable difference) - two stimuli diff. by a percentage rather than an amount o Sensory Adaptation: (game overtime) Become less aware of stimulus once your exposed to it over time (becomes ignored) Diminishes sensitivity as consequences of constant stimulation * leaves open to changes in our environment SENSES: Transduction: process that any stimulus energy is transformed into neural impulses 1. Vision: Stimulus Input a. Light energy - Visible Spectrum
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