Data from a prospective longitudinal study following 214 children between the ages of 2 and 13 who were diagnosed with either autism spectrum disorder or non-spectrum developmental delays at age 2.
data(autism)
A data frame with 604 observation on the following 7 variables:
Child ID.
Sequenced Inventory of Communication Development group (an
assessment of expressive language development) - a factor. Levels are
low, med, and high.
Age (in years) centered around age 2 (age at diagnosis).
Vineland Socialization Age Equivalent
Child's gender - a factor. Levels are male and female.
Child's race - a factor. Levels are white and nonwhite.
Diagnosis at age 2 - a factor. Levels are autism and
pdd (pervasive developmental disorder).
http://www-personal.umich.edu/~kwelch/
Anderson, D. K., Lord, C., Risi, S., DiLavore, P. S., Shulman, C., Thurm, A., et al. (2007). Patterns of growth in verbal abilities among children with autism spectrum disorder. Journal of Consulting and Clinical Psychology, 75(4), 594--604.
Anderson, D. K., Oti, R. S., Lord, C., & Welch, K. (2009). Patterns of Growth in Adaptive Social Abilities Among Children with Autism Spectrum Disorders. Journal of Abnormal Child Psychology, 37(7), 1019--1034.