LING 390 Lecture Notes - Oddball Paradigm, Auditory Cortex, Mismatch Negativity
5 Dec 2012
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Collected vocal sounds (speech and nonspeech) and nonvocal sounds (industrial and musical sounds) They then did a vowel-based analysis of (vocal sounds - nonvocal sounds): this asks where there is a greater signal for vocal sounds than nonvocal sounds. Four conditions: speech, nonspeech, scrambled speech and scrambled nonspeech. They found that there was a significantly greater activation for speech in all areas. Most of the time when you have gyrus activation, you have some sulcus activation too. The only time that activation was higher for scrambled nonspeech than nonspeech was in the anterior superior gyrus/sulcus. Speech doesn"t have to be in their native language. There"s one area that"s selective/specific to vocal processing. We"re looking at time course and where phonological differences appear. It"s kind of hard to disentagle phonetcs from phonology, but there was a design invented to try and look at whether primary auditory cortex is sensetive. Experimental trick: oddball paradigm (cows and ghosts)
