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Sensation and Perception Videos 15 videos

AP Psychology 1.1 Sensation and Perception
249 Views

AP Psychology 1.1 Sensation and Perception. The process by which the brain can turn sensory stimuli from the outside world into electrical signals...

AP Psychology 1.2 Sensation and Perception
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AP Psychology 1.2 Sensation and Perception. The cells in the back of the eye that only see in black and white are called what?

AP Psychology 2.3 Sensation and Perception
63 Views

AP Psychology 2.3 Sensation and Perception. Bill thinks pickles taste awful. Which of the following is responsible?

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AP Psychology 1.4 Sensation and Perception 17 Views


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AP Psychology 1.4 Sensation and Perception. Who was the researcher that determined this?

Language:
English Language

Transcript

00:00

here's your shmoop du jour brought to you by bell bottom jeans.

00:07

early design sketches also included whiffle's but we're deemed too clunky.

00:11

bell bottom. alright here's today's question research conducted in the 1960s [man in baggy jeans frowns]

00:16

and 1970s led to the understanding that the physical power of a stimulus ie how

00:22

loud a sound is- is related to our perception of the magnitude of that

00:27

stimulus. researchers that determined this was puma .and here are the potential

00:33

answers. alright let's run down what each researcher was best known for. starting

00:39

with Fechner. gustav fechner was a german philosopher physicist and psychologist

00:45

best known as an early pioneer of Experimental Psychology. fechner was

00:49

credited with introducing the median into formal data analysis developing the

00:54

fechner color effect- an illusion that causes people to see color when looking

00:58

rapidly moving black and white patterns as well as producing the Weber Fechner

01:03

law which combines his own work with that of Ernst Heinrich Weber. yeah.

01:09

unfortunately the fetch new color illusion doesn't work on computer screen

01:13

so showing it to you would be pointless. try to contain your disappointment there.

01:16

anyway. Ernst was along with spatula another key founder of

01:20

Experimental Psychology and psychophysics often working with [Fetchner and Weber pictured]

01:23

sensation and touch. well the Weber Fechner law was a proposed relationship

01:28

between the magnitude of the physical stimulus and entity or strength that

01:31

people feel. sounds a lot like the question huh? I'm sure it could work that

01:35

is if Weber-fechner who actually work in the sixties and seventies and not

01:39

when they actually worked which was in the 19th century. going cross out a and

01:44

c. our next choice Leon Fetchner. he at least fits the time period he was born

01:49

in nineteen nineteen and died in 1989. unfortunately for us he was a social

01:54

psychologist best known for his social comparison theory as well as his work in

01:58

cognitive dissonance. while focusing on the latter for a second. festinger [social comparison theory explained]

02:03

believe that humans strove for internal consistency, so when two conflicting

02:08

ideas creating the internal tension within someone, for example they know

02:12

smoking gives you cancer but continue smoking

02:14

anyway, they simply ignore the conflict all together in order to continue living

02:18

a happy life. everyone owes cognitive dissonance a bit of us thank you because

02:23

without it we probably wouldn't be able to have our weekly pizza and ice cream

02:26

parties without breaking down and sobbing afterwards. we all get fat

02:29

and bad stuff they put in our bodies. great research but not our answer. well

02:34

Georg Ilyas ruler was another significant German psychologist renowned

02:39

for his work on a phenomenon called retroactive interference, which describes

02:44

when newly learned information causes us problems recalling old information. it's [man peers thoughtfully at the sky]

02:50

like if you were in the middle of learning Spanish but took a year abroad

02:53

in rome to learn italian when you return to your spanish class you'd probably

02:57

find yourself slipping into italiano which is not muy bien that's retroactive

03:02

interference. interesting yes but not the answer we're looking for when cross out

03:06

e the actual answer we're looking for is s. s Stephens. he's best

03:13

known Stephens power law. it's very similar to the vember Fechner law but

03:17

it's considered superior since it describes a wider range of sensations. it

03:21

was also developed in the 60s and 70s so it fits just as well as our

03:25

bell-bottom jeans. Fetchner-weber have ever laid the foundations for the theory that the

03:30

larger the magnitude of a stimulus the larger the just noticeable difference. [field of sunflowers]

03:34

take 20 watt light bulb in a 40 watt light bulb. they looks very different

03:38

because one is twice as powerful as the other, but if you were to take 140 watt and

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160 watt light bulb now they look more or less the same even though they're

03:46

just is different numerically, as the 20 and 40 watt bulbs their work was great

03:52

but it fell short once you got into extreme values and also failed to cover

03:55

many different kinds of stimuli. Stephens improve the theory by introducing an

03:59

exponential function to the complex equation and we're not even going to try

04:02

and tackle here. ultimately he filled the holes left by previous theorists. so b is

04:07

the answer we're looking for B is in bell bottom blues, if we only had a handy

04:11

whistle we can blow it in celebration. dare to dream bell bottom blues make me [ man with bells and whistles attached to jeans]

04:18

cry.

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