Transcript IASLT 2013 J Quigley.ppt

Infant Directed Speech
with infants at risk of
Autism Spectrum Disorder
Jean Quigley
School of Psychology
Trinity College Dublin
Funded by IRCHSS
Mother-Infant interaction
A co-construction
• Mother’s vocal style shapes infant vocalisations &
responsiveness
• Infant’s initiating, attending & responding
behaviour shapes mothers’ responsiveness
• Interaction between at-risk infants & mothers?
Infant Directed Speech (IDS)
Main functions
•
•
•
•
communicates affect
harnesses infant preferences
engages infant attention
facilitates language acquisition
Dynamic & adapted to changing needs of infant
Participants
18 mothers:
Mean age 34 yrs
2nd/3rd level ed.
low-to-mid SES
19 infants:
Mean age 1st visit: 3.7(LR)/5.2 (HR)
•
10 low-risk (LR), no known risk factors (7m;3f)
•
9 high-risk (HR), older sib(s) clinical diagnosis of
ASD (4m;5f, incl. MZ girls)
Methodology
• Prospective video analysis of naturalistic face-toface interaction
• All speech & vocalisations analysed
Tests (12, 18, 24, 36 months)
• Bayley Scales of Infant Development—III Ed.
• Early Social Communication Scales
Grammatical IDS
Data for language acquisition
HR mothers
• lower MLU, VOCD, total # word types
• more zero clause utterances, up to 80% of input
• more use of infant’s name in isolation
• sig. associations: positive correlations only with
HR 12 month language scores
Quigley, J. Mother’s infant directed speech to preverbal infants at-risk for autism. International Meeting For
Autism Research, San Diego 2011.
Functional IDS
Important in shaping infant responsiveness
HR mothers
• more attention devices
• more clarification requests
• less contingent /responsive utterances
• sig. associations: only for LR dyads
Quigley, J. & McNally, S. (2013). Maternal communicative style in interaction with infant siblings of children
with Autism, Language, Interaction, Acquisition, 4(1).
Prosodic IDS
Pitch range narrows, utterance intensity decreases
with infant age
HR mothers (12-18 months)
• higher pitch range & utterance intensity,
increases with age.
• atypical trajectory of prosodic expression &
preference.
Quigley, J., McNally, S., & Lawson, S. Prosody in infant-mother dyads at-risk of autism. Child Language
Seminar, Manchester 2013.
Infant vocalisations
Mothers selectively respond/imitate vocalisations
Infants use this feedback to shape babbling
HR dyads (18 months)
• infants more dev. less complex vocalisations
• mothers imitate & respond to more non speech-like
vocalisations
• sig. associations only for LR dyads
Quigley, J. & McNally, S. Maternal response patterns to infant vocalisations. 3 rd Early Language Acquisition Conference Lyon
2012.
Conclusions
• Early identification via maternal rather than
infant behaviour
• Risk sensitivity important factor
• Few outcome associations: language
development facilitated only when child actively
engaged
• Infant behaviour alters the input they receive
leading to potential cascading effects on
language development.