A Comparison Of Children With Autism Spectrum Disorder Diagnosed Before Two Years Of Age To Those Diagnosed While Two Years Of Age
This study investigated two samples of children diagnosed with Autism Spectrum Disorder (ASD) diagnosed before age two to a sample diagnosed with ASD after age two, but younger than three years. These groups were compared to gauge any differences in functioning indicative of ASD in attempts to increase literature on younger ASD profiles. A database from a local Nashville university research clinic was used to obtain data. A final sample size of 508 participants were used to identify early ASD profiles using the Mullen Scales of Early Learning (MSEL), Vineland Adaptive Behavior Scales, Second Edition (VABS-II), and the Autism Diagnostic Observation Schedule, Second Edition (ADOS 2). Findings did not support any differences between below 24 months and older than 24 months on measures of cognitive abilities, adaptive abilities, and autism severity. These differences were also not observed when comparing group based on having an older sibling with ASD. Lastly, rural versus urban status did not support no differences between groups.^
Kristeena G Jenkins,
"A Comparison Of Children With Autism Spectrum Disorder Diagnosed Before Two Years Of Age To Those Diagnosed While Two Years Of Age"
ETD Collection for Tennessee State University.