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in depth study guide - Psychology Exam Two Study Guide...

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Psychology Exam Two Study Guide Chapter 6 Sensation- the process by which our sensory receptors and nervous system receive and represent stimulus energies from our environment Perception- the process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and events Transduction- converting environmental energies into neural impulses Absolute threshold- the minimum stimulation needed to detect a particular stimulus 50% of the time Just noticeable difference- the minimum difference a person can detect between any two stimuli half the time Weber’s law- principle that to be perceived as different, two stimuli must differ by a constant minimum percentage (rather than amount) Signal detection- predicts when we will detect weak signals (hits/false alarms) Subliminal stimulus- stimulus that is below one’s absolute threshold for conscious awareness works when one is primed (activation of unconscious associations, thus predisposing one’s perception, memory or response) Role of thalamus- optic nerve transmits signals back to brain to thalamus to visual cortex (aka occipital lobe) the thalamus will receive and distribute the information Feature detectors- neurons in the occipital lobe’s visual cortex receive information from individual ganglion cells in the retina ability to respond to a scene’s specific features Rods vs. cones- rods control black-white vision… cones perceive color
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