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From sounds to words - Coggle Diagram
From sounds to words
neural tracking of hierarchical linguistic structures
dependence on language comprehension
tracking of linguistic structures, not probability cues
dependence on syntactic structures
neural tracking of sentences varying in duration and structure
dual-stream model
dorsal stream
left-hemispheric
sound to action
- sensorimotor integration
why?
speech development
neural mechanism for phonological short-term memory
two levels (at least)
speech segments
acquisition / maintenance of basic articulatory-phonetic skills
sequences of speech segments
acquisition of new vocabulary
online guidance of speech sequences
ventral stream
bilateral
parallel computations
mapping acoustic input to lexical phonological representations
theta range (6-10 Hz) sampling network (right dominant)
slow, suited for analysing syllable level information
gamma range (25 - 140 Hz) sampling network (bilateral?)
fast, suited for segment-level information (phonemes)
comprehension -
sound to meaning
levels of computation and representation
syllabic structure
phonological word forms
phonemes
grammatical features
semantic information
speech recognition
are all those steps involved?
serial or parallel processing?
can neuro-tracking be learned?
statistical learning in language development / acquisition
speech-structure learning in typical readers (TR) and developmental dyslexic readers (DD) (Zhang, 2021)
methods
post-training recognition task
tests on reading and phonological skills
exposure so stimuli while EEG recording
three artificial speech streams
real words (RW)
random sequence of (tri-syllabic) pseudo words (RS)
structured sequence of pseudo words (SS)
EEG analysis
inter-trial phase coherence (ITPC)
extent to which electrical activity Is phase-locked across single trials at a given frequency
results
slower learners less skilled in phonological awareness
stronger neural tracking tend to be less fluent in visual-verbal conversion of linguistic symbols
emergence of tracking of pseudoword structures - at a slower rate for DD
gradual decrease in differences in neural activity between SS and RW comditions
strength of word-phase locking and distribution of activity
fronto-central distribution of activity
DD on average 1.7 min later than TR
