Psych chpt 4

organization and interpretation of sensations

• psychophysics

• smelling

• perception

• sensation

Determines the ability of the perceiver to separate the signals from background noise

• absolute threshold

• six senses

• perception

• Signal detection

  Analysis

What is psychophysics

• Studies effects of physical stimuli on sensory perceptions and mental states

• study of six senses

• Study of the Just Noticable Difference (JND)

• ABILITY to detect the presence or absence of signals

Just noticeable difference of a stimulus is a constant proportion of the original intensity of the stimulus IN relationship to the absolute size

• young Helmholtz theory

• Difference threshold

• Webers law

• Subliminal Stimuli

Conversion of stimuli detected by receptor cells to electrical impulses that are transported to the brain.Used by each sense

• perception

• Preprioception

• transduction

• Behavioral Tendency

allows organism to just barely detect it. minimum intensity for detection

• Absolute Threshold

• Just Noticable difference

• Blindsight

• Subliminal Stimuli

Ability to sense the position and movements of our body parts

• conscienseness

• Response Bias

• perception

• preprioception

Using psychological knowledge to improve development of technology

• Illusions

• Depth Cues

• Human factors

• visual perception

used to differentiate sensitivity from response biases

• Beta Effect

• Signal detection analysis

• States of consciousness

• Selective attention

Ability to perceive a stimulus as a constant despite change in sensation

• Perceptial constancy

• Selective attention

• Sensory adaption

• proprioception