PSY 2601 Lecture Notes - Lecture 4: Psy, Phineas Gage, Positron Emission Tomography
19 Oct 2015
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Lecture 4: testing methods: behavioral & cognitive neuroscience: overview, behavioral testing: methods and assumptions, cognitive neuroscience techniques, summative overview of main points, behavioral testing, typically reaction time (rts) Goal is to identify components that mark certain types of processes. Components coded in terms of polarity and average peak n 400; p 600; Dog produces more negativity than kite n400, semantic expectancy violation on a windy day maria flew a dog outside. Event-related potentials: erp components on a windy day maria flew a kite outside. Erps are identified by time-locking the eeg signal to the onset of some important event ex: kite (expected) vs. dog (unexpected) Many trials averaged together (erp components not observable on a trial-by-trial basis) Signal thought to be the result of summed post-synaptic activity. Can"t make claims about where this activity is being generated. Measure of neural sensitivity to different information sources. Good temporal (time) sensitivity, bad localization (where) information: magnetoencephaloraphy (meg)
