01:830:301 Lecture Notes - Lecture 3: Lesion, Neuropsychology, Action Potential
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Up sequences - start with weak (undetectable) stimulus, gradually increase intensity, mark crossover point . No right answer as to whether an individual saw or did not see the color. Different people have differences in individual criterion/motivation level. To address such concerns, forced-choice methods are used. Forced-choice methods - subjects have to pick a given answer, set up task so there"s always a right answer on every trial. 2 alternatives forced choice task - 2afc task. If invisible, observer has to guess, on average, ~50% correct. Doctrine of specific nerve energies (johannes muller) What matters is which nerves are stimulated not how they"re stimulated: lesion studies (neuropsychology) Location (locus) of lesion <> loss in performance, you can find out which part of the brain is responsible for what. Difficulty in interpretation: correlation does not imply causation. 1: economy of san francisco/golden gate bridge, ex. 2: radio transistor: screech suppressor : single-cell recording.
