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Conners, Frances A.; Tungate, Andrew S.; Abbeduto, Leonard; Merrill, Edward C.; Faught, Gayle G. – American Journal on Intellectual and Developmental Disabilities, 2018
Forty-two adolescents with Down syndrome (DS) ages 10 to 21 years completed a battery of language and phonological memory measures twice, 2 years apart. Individual differences were highly stable across two years. Receptive vocabulary scores improved, there was no change in receptive or expressive grammar scores, and nonword repetition scores…
Descriptors: Adolescents, Down Syndrome, Language Acquisition, Language Skill Attrition
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McDuffie, Andrea; Machalicek, Wendy; Bullard, Lauren; Nelson, Sarah; Mello, Melissa; Tempero-Feigles, Robyn; Castignetti, Nancy; Abbeduto, Leonard – American Journal on Intellectual and Developmental Disabilities, 2016
Using a single case design, a parent-mediated spoken-language intervention was delivered to three mothers and their school-aged sons with fragile X syndrome, the leading inherited cause of intellectual disability. The intervention was embedded in the context of shared storytelling using wordless picture books and targeted three empirically derived…
Descriptors: Intervention, Speech Communication, Genetic Disorders, Intellectual Disability
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Turkstra, Lyn S.; Abbeduto, Leonard; Meulenbroek, Peter – American Journal on Intellectual and Developmental Disabilities, 2014
This study aimed to characterize social cognition, executive functions (EFs), and everyday social functioning in adolescent girls with fragile X syndrome, and identify relationships among these variables. Participants were 20 girls with FXS and 20 age-matched typically developing peers. Results showed significant between-groups differences in…
Descriptors: Executive Function, Social Cognition, Interpersonal Competence, Females
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Smith, Leann E.; Barker, Erin T.; Seltzer, Marsha Mailick; Abbeduto, Leonard; Greenberg, Jan S. – American Journal on Intellectual and Developmental Disabilities, 2012
The present study explored the behavioral profile of individuals with fragile X syndrome during adolescence and adulthood. Individuals with both fragile X syndrome and autism (n = 30) were compared with (a) individuals diagnosed with fragile X syndrome (but not autism; n = 106) and (b) individuals diagnosed with autism (but not fragile X syndrome;…
Descriptors: Behavior, Profiles, Genetic Disorders, Mental Retardation
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McDuffie, Andrea; Kover, Sara; Abbeduto, Leonard; Lewis, Pamela; Brown, Ted – American Journal on Intellectual and Developmental Disabilities, 2012
The authors examined receptive and expressive language profiles for a group of verbal male children and adolescents who had fragile X syndrome along with varying degrees of autism symptoms. A categorical approach for assigning autism diagnostic classification, based on the combined use of the Autism Diagnostic Interview--Revised and the Autism…
Descriptors: Receptive Language, Expressive Language, Language Skills, Profiles
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McDuffie, Andrea; Abbeduto, Leonard; Lewis, Pamela; Kover, Sara; Kim, Jee-Seon; Weber, Ann; Brown, W. Ted – American Journal on Intellectual and Developmental Disabilities, 2010
The Autism Diagnostic Interview-Revised (ADI-R) was used to examine diagnostic profiles and age-related changes in autism symptoms for a group of verbal children and adolescents who had fragile X syndrome, with and without autism. After controlling for nonverbal IQ, we found statistically significant between-group differences for lifetime and…
Descriptors: Autism, Interests, Intelligence Quotient, Interaction