Back to Search
Start Over
Is it still speech? Different processing strategies in learning to discriminate stimuli in the transition from speech to non-speech including feedback evaluation
- Source :
- Brain and cognition. 125
- Publication Year :
- 2017
-
Abstract
- Processing of speech was investigated by using stimuli gradually changing from speech (vowels) to non-speech (spectral rotated vowels). Stimuli were presented in descending levels of vocalization blends, from pure speech to non-speech, through step-wise combinations, resulting in ambiguous versions of the sounds. Participants performed a two-alternative forced choice task: categorization of sounds were made according to whether they contained more speech or non-speech. Performance feedback was presented visually on each trial. Reaction times (RT) after sound presentation, and functional magnetic resonance imaging (fMRI) data during auditory and visual processing, were analyzed. RT data suggested individual differences with a distinct group, good performers, functioning better in distinguishing stimuli with a higher degree of ambiguous blends compared to poor performers, who were not able to distinguish these stimuli correctly. fMRI data confirmed this finding. During auditory stimulation, good performers showed neural activation in the ventral auditory pathway, including the primary auditory cortex and the anterior superior temporal sulcus (responsible for speech processing). Poor performers, in contrast, showed neural activation in the dorsal auditory pathway, including the bilateral superior temporal gyrus. Group differences were also found for visual feedback processing. Differences observed between the groups were interpreted as reflecting different neural processing strategies.
- Subjects :
- Adult
Male
medicine.medical_specialty
Auditory Pathways
Cognitive Neuroscience
Experimental and Cognitive Psychology
Audiology
Auditory cortex
050105 experimental psychology
Visual processing
03 medical and health sciences
Superior temporal gyrus
Young Adult
0302 clinical medicine
Arts and Humanities (miscellaneous)
otorhinolaryngologic diseases
Developmental and Educational Psychology
medicine
Reaction Time
Humans
Speech
0501 psychology and cognitive sciences
Auditory Cortex
Brain Mapping
medicine.diagnostic_test
Two-alternative forced choice
05 social sciences
Superior temporal sulcus
Speech processing
Magnetic Resonance Imaging
Neuropsychology and Physiological Psychology
Categorization
Acoustic Stimulation
Speech Perception
Female
Psychology
Functional magnetic resonance imaging
030217 neurology & neurosurgery
Subjects
Details
- ISSN :
- 10902147
- Volume :
- 125
- Database :
- OpenAIRE
- Journal :
- Brain and cognition
- Accession number :
- edsair.doi.dedup.....2dbb7c71fa730a483adc43dc8711566f