Lectr06_prosody_inferences_2-22-12

Lectr06_prosody_inferences_2-22-12 - CogSci 210 Language...

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CogSci’210’ Language’and’the’Brain’ HW6 due next Monday, 2-27 - LAST Homework!! submit fle as: LastnameI[nitial]_HW6_date.docx e.g., BeemanM_HW6_2-27.docx Monday March 5: Exam 2 - not cumulative, but… LH dominance and RH contributions LH clearly dominant for most (apparent) language tasks RH sometimes contributes to recovery What does RH normally do? Prosody Higher level comprehension: gist, conxns, figurative language LH language dominance: New Question Why is LH “dominant”… And, why does the RH do what it does with language? Causal mechanisms Anatomical basis???????????? Work toward a theory to explain both LH dominance and RH contributions Prosody The “melodic contour” of speech Pitch, amplitude, stress Accent, rate Pause durations Modulated within and across words and sentences (short and long-range) Conveys information not conveyed in words themselves Type of statement Emotion, intent, importance Lateralization of prosody Right hemisphere damaged patients Impaired ability to produce and comprehend prosody Retain ability to produce and perceive phonemes and linguistic tone categories (in tonal languages) Dichotic listening (in noise, difFcult task) Left ear-RH advantage for prosody, voice recognition Right ear-LH advantage for phoneme and word identiFcation, even tone-dependent Prosody versus tonal languages Why the LE±T hemisphere advantage for word recognition, even when it depends on tonal (I.e., low frequency) information? Is it the linguistic nature, or something else? Even if it is some other aspect of input/processing, is that feature completely confounded with language?
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Prosody Besides being in low frequencies, what else differs b/w prosody and phonology? Prosody is “nonlinguistic” Prosody is more continuous, less categorical Question versus statement? Why would different brain areas - different hemispheres - be involved for continuous versus categorical speech signals? Prosody Phonology Prosody Categorical Continuous Rapid Slow Temporally discrete Temporally blurred What kind of system has advantages for rapid, categorical selection? What kind of system has advantages for slower, continuous, & precise, without need for selection? Prosody - summary The right hemisphere has a relative advantage for processing many aspects of prosody The left hemisphere has a relative advantage for processing many other aspects of language (phonology, syntax, some semantics) Advantages are relative, not absolute; bases could be: - sound frequency – to a certain extent (but must explain tonal languages) - categorical/continuous nature (relative Fneness/ coarseness of coding?) - the linguistic nature (but how determine?) RH contributions to language Prosody Extra- or paralinguistic?
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Lectr06_prosody_inferences_2-22-12 - CogSci 210 Language...

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