Temporally selective attention supports speech processing in 3- to 5-year-old children.
Recent event-related potential (ERP) evidence demonstrates that adults employ temporally selective attention to preferentially process the initial portions of words in continuous speech. Doing so is an effective listening strategy since word-initial segments are highly informative. Although the development of this process remains unexplored, directing attention to word onsets may be important for speech processing in young children who would otherwise be overwhelmed by the rapidly changing acoustic signals that constitute speech. We examined the use of temporally selective attention in 3- to 5-year-old children listening to stories by comparing ERPs elicited by attention probes presented at four acoustically matched times relative to word onsets: concurrently with a word onset, 100 ms before, 100 ms after, and at random control times. By 80 ms, probes presented at and after word onsets elicited a larger negativity than probes presented before word onsets or at control times. The latency and distribution of this effect is similar to temporally and spatially selective attention effects measured in adults and, despite differences in polarity, spatially selective attention effects measured in children. These results indicate that, like adults, preschool aged children modulate temporally selective attention to preferentially process the initial portions of words in continuous speech.
Department of Psychology and Neuroscience and Behavior Program, Tobin Hall, University of Massachusetts, Amherst, MA 01003, USA. lastheim@cns.umass.edu
Lori B
LB
Astheimer
Lisa D
LD
Sanders
D000161:Acoustic Stimulation; D001288:Attention / Q000502:physiology*; D002657:Child Development / Q000502:physiology*; D002675:Child, Preschool; D004566:Electrodes; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D011930:Reaction Time / Q000502:physiology; D013067:Speech Perception / Q000502:physiology*