Psychophysics Flashcards
what does science tend towards
redutionism
what is psychophysics
sub-sub-discipline of psych
is the study of physical stimuli and psychological effect
what is webers law
perceptual inensity (snesation intensity) vs physical intensuty
what does webers law give
just noticable difference (JND)
what is an example of JND
when u are in noisy environment you must shout to be heard whie whisper works in quiet room
how is webers less best described
as your ability to detect difference is best thought of as percentage difference
what does the psychmetric curve characterise
relationship between physical stimulus parameter and probability to detect stimulus
what is a forced choice
present a signal on some trials and no signals on others (detection)
what do forced trials do
subject forced on every trial to say yes i saw it or no i didnt and this way we can count botht the number of hits and number of false alarms
