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Canada (158,336)
BIOCH498 (4)
Chapter 4


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University of Alberta
Brian Lanoil

1 3 Pyschophysics The study of how sensations are turned into perceptions - the strength of a stimulus and the observer's sensitivity to that stimulus 4 Absolute threshold The minimum detectable source of a stimulus 5 Method of limits Present a sensation and make small increments to it, either continuously increasing or decreasing its intensity - ask participant to note when the perception of that sensation disappears 6 Method of adjustment Allow a participant to control the intensity of a sensation, and adjust it to a point where it is just barely detectable 7 Method of constant stimuli Present a sensation one at at time in random order of intensity - the value where the stimulus is detectable 50% of the time is the limit 8 What is the order, in highest to lowest absolute threshold, of the different methods? Method of limits > method of constant stimuli > method of adjustment 9 Gestalt psychology Stimulation is processed "as whole", and not in terms of its parts 10 Perception from the "top down" We consistently try to impose our previous knowledge of the word to interpret our current stimuli - overlook things that don't fit Perception is more about how things relate than what is being sensed 11 Rods Photoreceptors that cannot detect colour and are poor at picking up detail, but are attuned to motion - contain the same photopigment 12 Cones Photoreceptors that can detect colour and fine detail, but are poor at detecting motion - more dense near the fovea - contains any one of three types of pigments 13 Subliminal perception Our behaviour can be biased by information we have been exposed to unconsciously 14 Priming Presenting information will prepare (prime) people to recognize and interact with other, similar information even if they were not consciously aware of the information in the first place 15 Pop-out effects Perceptually distinct information tends to 'pop-out' at us 16 Synesthesia Some people have extra perceptual experience - the perceptual experience of one sense that is evoked by another sense 17 Grapheme color synesthesia People experience some letters/numbers as inherently coloured, even if they have no colouring 18 Cocktail-party effect We are fine-tuned to our own names - when spoken over many simultaneous conversations, information that is relevant to ourselves seems to pop out 19 Motion perception We are able to perceive temporal patterns as well as static things 20 Size-weight illusion When held, objects with more volume are perceived as lighter, even when their mass remains the same For objects whose width increases with volume, objects were perceived as lighter as they got larger For objects whose length increased with volume, objects were perceived as heavier as they got larger 21 Wieldability Perceptio
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