Alcock, Katherine Jane

Brelsford, Victoria

Christopher, Anna Elisabeth

Just, Janine

Meints, Kerstin

Rowland, Caroline F.

Summers, Jayne

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 Communicative Development Inventories (Fenson et al, 2007) are ideal tools for: •  Clinical assessment especially where clinicians are not qualified SALTs •  Research where lab assessment of vocabulary size/composition is impractical •  Large scale research •  Parent report accesses communication skills otherwise hard to assess directly (e.g. some types of vocabulary, where children are reluctant to interact with a stranger, Fenson et al (2007)  CDIs in English so far: •  US English standardised •  UK English non-standardised •  Infant (Hamilton et al., 2000), toddler and 3/4y versions •  Also many, many versions for specific labs •  No standardised UK versions  UK health professionals using US norms:  Why is this a problem?    !  UK parents report lower vocabulary  sizes than US parents  ! Inappropriate use of US norms for UK children     New UK-CDI (Alcock, Rowland, Meints, Christopher, Just & Brelsford, in prep.) •  Long and Short CDI – Words and Gestures – 8-18 months •  Score sheets •  Manual with norms •  Stratified sample by region and SES as well as other factors •  Online database accessible for all INTRODUCTION NORMING PILOTING RESULTS AND DISCUSSION Construction and standardisation of the UK Communicative Development Inventory (UK-CDI ), Words and Gestures  Katie Alcock1, Caroline Rowland2, Kerstin Meints3, Anna Christopher1,2, Janine Just3, Victoria Brelsford3, Jayne Summers1 Lancaster University1, University of Liverpool2, and University of Lincoln3 1.  Authorisation from CDI board 2.  Pilot construction a.  Used data from other UK Babylabs b.  Wide variety of CDIs in circulation c.  Words where comprehension correlated significantly with age were included 4.  Two rounds of piloting a.  Included items if correlated with age and rest of scale  b.  Also if known better by low SES group (round 2) and some v high frequency or specialist words 5.  Also created demographic/medical questionnaire, the Family Questionnaire a.  Piloted and focus groups with special groups e.g. young mums b.  Wording adjusted several times and some groupings e.g. groups of age more acceptable to parents than raw age.             •  Participants •  Recruitment -  successful methods: via other babylabs (81% participation);  through targeted ads on social media (56% participation, using commercial algorithms) -  less successful methods included via Health Visitors/NHS (10%);  in person: baby groups/Children’s Centres (34%) •  Exclusion: more than 10 hours a week of another language •  No exclusion for disability: instead sample balanced to represent UK  •  Procedure •  Sign up via flyer/web  •  Receive paper or online questionnaire •  If we have postal address: •  Memento (laminated) -> •  And/or £5 supermarket voucher for low income families •   Online methods •  Survey Monkey, now Qualtrics •  Invite by email or set up participation link •  Babytalk app (in preparation)  •  Validation •  Inter-form, paper vs online •  Test- re-test •  CDI vs lab testing – PLS-5, object selection, gesture task  •  Short form •  91 words and 29 gestures that range in age of acquisition  and correlate well with age •  Stratification  •  Stratified N = 1218 •  Regions, gender, age balanced as far as possible •  Reliability (internal/inter-scale) •  Validity (inter-form) •  > 0.9 correlation between online and paper We have a new tool!  New UK-CDI: •   Highly internally valid •  Good correlation with age •  Length (moderately) acceptable to parents •  Online completion helps •  Recruitment via Social Media company ads very productive  References: •  Alcock, K.J., Meints, K., Rowland, C. F., Christopher, A.  Just, J. & Brelsford, V.  (in prep). The UK Communicative Development Inventory: Words and Gestures. •  Hamilton, A., Plunkett, K., & Schafer, G. (2000). Infant vocabulary development assessed with a British communicative development inventory. Journal of Child Language, 27(3), 689-705.  •  Fenson, L., Marchman, V. A., Thal, D., Dale, P. S., Reznick, J. S., & Bates, E. (2007). MacArthur-Bates Communicative Development Inventories (CDIs), Second Edition (Vol. 59). Baltimore, MD: Brookes. The UK-CDI project is funded by the Economic and Social Research Council. The support of the ESRC [ES/J007692/1] is gratefully acknowledged. infant vocabulary development in the uk908050401001;0 –1;1Percentage of words on CDI understood or producedAge group20306070100pre 19961996 A1996 B1998pre 19961996 A1996 B1998Comprehension Production1;2 –1;3 1;4 –1;5 1;6 –1;7 1;8 –1;9 1;10 –1;11 2;0 –2;1Fig. 7. Median vocabulary scores obtained using four di erent versions of the Oxford CDI.908050401001;0 1;1 1;2 1;3 1;7 1;8 1;9 1;10CDI score (%)Age1;4 1;5 1;6 1;11 2;0 2;120306070100UK comprehensionUSA comprehensionUK productionUSA production (line after 1.4is data from toddler CDI)Fig. 8. Median comprehension and production vocabulary in the USA and the UK.aaUS data is redrawn from Fenson et al. (1994), Figures 2, 3 and 4. Data for the Americaninfants production score after age 1 ;4 is derived from the MacArthur ‘toddler CDI’.699X took part in the UK-CDI project on YY This word cloud shows the words he understands	  Variable UK Our sample Ethnicity (Home language English only) 13.7% non-white 8.6% non-white Education 42.6% degree or higher 52.2% degree or higher Income 50% below median 42.9% below median Age Comprehension Production Comprehension .67 Production .48 .67 Gesture .79 .78 .56 ACKNOWLEDGEMENTS 

Construction and standardisation of the UK Communicative Development Inventory (UK-CDI ), Words and Gestures

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Construction and standardisation of the UK Communicative Development Inventory (UK-CDI ), Words and Gestures

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