References
- Altman, D. A., Machin, D., Bryant, T. N., Gardner, M. J., 2000, Statistics With Confidence London: BMJ Books.
- Bates, E., Dale, P., Thal, D., 1995, Individual differences and their implications for theories of language development. In Fletcher P., McWhinney B. (eds), The Handbook of Child Language Oxford: Blackwell, 96–151.
- Bavin, E., Prior, M., Reilly, S., Bretherton, L., Williams, J., Eadie, P., Barrett, Y., Ukoumunne, O.. 2008. The Early Language in Victoria Study: predicting vocabulary at 1 and 2 years from gesture and object use. Journal of Child Language. 35, 687–701.
- Bzoch, K. R., League, R., Brown, V. L., 2003, Receptive–Expressive Emergent Language Scales—3 Austin, TX: PRO-ED.
- Capone, N., McGregor, K.. 2004. Gesture development: a review for clinical and research practices. Journal of Speech, Language and Hearing Research. 47, 173–186.
- Cohen, J.. 1992. Quantitative Methods in Psychology. A Power Primer. Psychological Bulletin. 112, 155–159.
- Feldman, M. H., Dale, P. S., Campbell, T. F., Colborn, D. K., Kurs-Lasky, M., Rockette, H. E., Paradise, J. L.. 2005. Concurrent and predictive validity of parent reports of child language at ages 2 and 3 years. Child Development. 76, 856–868.
- Fenson, L., Marchman, V. A., Thal, D., Dale, P., Reznick, J., Bates, E., 2007, The MacArthur–Bates Communicative Development Inventories: User's Guide and Technical Manual Baltimore, MD: Paul Brookes.
- Flora, D. B., Curran, P. J.. 2004. An empirical evaluation of alternative methods of estimation for confirmatory factor analysis with ordinal data. Psychological Methods. 9, 466–491.
- Goldstein, H., 1995, Multilevel Statistical Models London: Arnold.
- Greenspan, S. I., Meisels, S., 1996, Toward a new vision for the developmental assessment of infants and young children. New Visions for the Developmental Assessment of Infants and Young Children Washington, DC: ZERO to THREE: National Centre for Infants, Toddlers and Families, 1–8.
- Law, J., Boyle, J., Harris, F., Harkness, A., Nye, C.. 2000. Prevalence and natural history of primary speech and language delay: findings from a systematic review of the literature. International Journal of Language and Communication Disorders. 35, 165–188.
- Lewis, V., Boucher, J., Lupton, L., Watson, S.. 2000. Relationships between symbolic play, functional play, verbal and non-verbal ability in young children. International Journal of Language and Communication Disorders. 35, 117–127.
- McCathren, R. B., Yoder, P. J., Warren, S. F.. 1999. The relationship between prelinguistic vocalisation and later expressive vocabulary in young children with developmental delay. Journal of Speech, Language, and Hearing Research. 42, 915–924.
- McCathren, R. B., Yoder, P. J., Warren, S. F.. 2000. Testing predictive validity of the communication composite of the Communication and Symbolic Behavior Scales. Journal of Early Intervention. 23, 36–46.
- Muthén, L. K., Muthén, B. O., 2007, Mplus User's Guide Los Angeles, CA: Muthén & Muthén.
- Nelson, H. D., Nygren, P., Walker, M., Panoscha, R.. 2006. Screening for speech and language delay in preschool children: systematic evidence review for the US preventative task force. Pediatrics. 2, 117.
- Pan, B. A., Rowe, M. L., Singer, J. D., Snow, C. E.. 2005. Maternal correlates of growth in toddler vocabulary production in low-income families. Child Development. 76, 763–782.
- Portney, L. G., Watkins, M. P., 2000, Foundations of Clinical Research: Applications to Practice Englewood Cliffs, NJ: Prentice-Hall.
- Reilly, S., Eadie, P., Bavin, E., Wake, M., Prior, M.,, Williams, J., Bretherton, L., Barrett, Y., Ukoumunne, O.. 2006. Growth of infant communication between 8 and 12 months: a population study. Journal of Paediatrics and Child Health. 42, 764–770.
- Reilly, S., Wake, M., Bavin, E., Prior, M., Williams, J., Bretherton, L., Eadie, P., Barrett, Y., Ukoumunne, O.. 2007. Predicting language at 2 years: a prospective community study. Pediatrics. 120, e1441–e1449.
- Rescorla, L., Alley, A.. 2001. Validation of the language development survey (LDS): a parent report tool for identifying language delay in toddlers. Journal of Speech, Language, and Hearing Research. 44, 434–445.
- Rescorla, L., Roberts, J., Dahlsgaard, K.. 1997. Late talkers at 2: outcome at age 3. Journal of Speech, Language, and Hearing Research. 40, 556–566.
- Ring, E. D., Fenson, L.. 2000. The correspondence between parent report and child performance for receptive and expressive vocabulary beyond infancy. First Language. 20, 141–159.
- Sachse, S., Von Suchodoletz, W.. 2008. Early identification of language delay by direct language assessment or parent report. Journal of Developmental and Behavioural Pediatrics. 29, 34–41.
- StataCorp, 2007, Stata Statistical Software: Release 10.1 College Station, TX: Stata Corporation.
- Tomasello, M., 2003, Constructing a Language: A Usage-Based Theory of Language Acquisition Cambridge, MA: Harvard University Press.
- Watt, N., Wetherby, A., Shumway, S.. 2006. Prelinguistic predictors of language outcome at 3 years of age. Journal of Speech, Language, and Hearing Research. 49, 1224–1237.
- Wetherby, A. M., Allen, L., Cleary, J., Kublin, K., Goldstein, H.. 2002. Validity and reliability of the Communication and Symbolic Behaviour Scales Developmental Profile with very young children. Journal of Speech, Language, and Hearing Research. 45, 1202–1218.
- Wetherby, A. M., Goldstein, H., Cleary, J., Allen, L., Kublin, K.. 2003. Early identification of children with communication disorders: concurrent and predictive validity of the CSBS Developmental Profile. Infants and Young Children. 16, 161–174.
- Wetherby, A. M., Prizant, B., 2002, Communication and Symbolic Scales—Developmental Profile Baltimore, MD: Paul H. Brookes.
- Young, A. R., Beitchman, J. H., Johnson, C., Douglas, L., Atkinson, L., Escobar, M.. 2002. Young adult academic outcomes in a longitudinal sample of early identified language impaired and control children. Journal of Child Psychology and Psychiatry. 43, 635–645.