Textbook Notes (368,288)
Canada (161,770)
Psychology (34)
PSYC-1000 (13)
Mike Lee (8)
Chapter 6

Intro Psych Chapter 6.docx

5 Pages
Unlock Document

Mike Lee

Sensation & Perception  Sensation = process by which sense organs gather info from the world and transmit it to the brain for initial processing  Perception = process by which the brain selects, organizes, and interprets sensations Dual, 2-stage process  2 perceptions from a single sensation Bottom-up/Top-down processing  Stage 1 - Bottom-up processing  Automatic (aka data-driven processing)  Stage 2 - Top-down processing  active/constructive (aka conceptually-driven processing) From the Physical to the Mental  Emphasizing incoming sensory information is insufficient to explain perception  considerations of context and of the perceiver's expectations and prior learning must also be made Psychophysics  Fundamental principle:  there is no one-to-one correspondence between physical and psychological reality  Sensing the environment  Senses share common features: 1. Translation o Transduction  Sensory receptors o Sensory neurons  Anatomical coding (Doctrine of specific nerve energies (Johaness Muller, 1926)) How Sensory Modalities lead to Different Perceptions: Stimulus- Olfactory Nerve- Smell Stimulus- Optic Nerve- Sight Stimulus- Auditory Nerve- Sound Synaesthesia  Mixing of sensations/perceptions  letter/digit color synaesthesia most common  Chromesthesia - color hearing  occurs with musical sounds in particular  bright colors - high pitch  dark colors - low pitch  basis is uncertain, possibly genetic  Sensory neurons  Functional coding  Brain codes for intensity and quality of sensory stimulation 2. Thresholds  Absolute threshold- Measuring the acuity of our senses  The smallest intensity of a stimulus that must be present for it to be detected. 3. Decision-making  Signal detection theory  Signal to noise ratio  Response bias 5. Tuning out irrelevant information  Neurons stop firing when the stimuli is constant.  Sensory Adaptation  Sensory systems are more sensitive to changes in the environment than to steady states  Reinforces an important and fundamental lesson for us:  We do not perceive the world as it is, but rather, as it is useful for us to perceive it!  Sensory Deprivation- can lead to hallucinations or could be relaxing (depending on context and mindset going into it).  Sensory Overload- leads to selective attention  Selective Attention o Cocktail party effect --> you can focus on one person at a party and you will perk up at the mention of your name because you were unconsciously paying attention. o Can lead to "unintentional blindness". o Change blindness--> door passed between and guys switched.  Vision is about 80% of what we perceive from the world (ex. We look away from needles). Retina  Light completes its journey; where transduction occurs  Photoreceptors- Rods and Cones- they transduce light into nerve impulses.  Blind Spot = no photoreceptors The Challenge for vision researchers is t
More Less

Related notes for PSYC-1000

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.