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).
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.