Table 1.
Primary author | Year published | Sample size and age | Sample diagnoses | Primary independent variables | Clusters identified | Cluster descriptions |
---|---|---|---|---|---|---|
Siegel | 1986 |
n = 46 4–20 years, M = 10.7 years |
AD | Developmental history questionnaire, parent report of current behavior, behaviors coded from a videotaped diagnostic evaluation | 4 |
|
Eaves | 1994 |
n = 166 3–12 years, M = 7.1 years |
AD, ASD, ASP, AT, HFA | Behaviors coded retrospectively from hospital charts | 4 |
|
Sevin | 1995 |
n = 34 2–22 years, M = 7.7 years |
AD, ASD | Childhood autism rating scale, autism behavior checklist, ritvo-Freeman real life rating scale, Vineland adaptive behavior scales | 4 |
|
Prior | 1998 |
n = 135 3–21 years, M = 10.22 years |
AD, ASD, HFA (only high functioning children included) | Autistic disorders checklist, peabody picture vocabulary test | 3 |
|
Fein | 1999 |
n = 194 3–7 years, M = 4.9 for ASD |
ASD, Developmental Language Disorder, low IQ | Autistic disorders checklist, peabody picture vocabulary test, Vineland adaptive behavior scales | 2 |
|
Stevens | 2000 |
n = 138 7–9 years, M = 8.6 years |
ASD | Autistic disorders checklist, peabody picture vocabulary test, Vineland adaptive behavior scales | 2 |
|
AD autistic disorder, including infantile autism and residual state autism, ASD autism spectrum disorder or pervasive developmental disorder, ASP Asperger’s syndrome, AT autistic tendencies, HFA high functioning autism