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Direct linkNorrelgen, Fritjof; Fernell, Elisabeth; Eriksson, Mats; Hedvall, Asa; Persson, Clara; Sjölin, Maria; Gillberg, Christopher; Kjellmer, Liselotte – Autism: The International Journal of Research and Practice, 2015
There is uncertainty about the proportion of children with autism spectrum disorders who do not develop phrase speech during the preschool years. The main purpose of this study was to examine this ratio in a population-based community sample of children. The cohort consisted of 165 children (141 boys, 24 girls) with autism spectrum disorders aged…
Descriptors: Autism, Pervasive Developmental Disorders, Preschool Children, Speech Skills
Ingesson, S. Gunnel – Dyslexia, 2006
A follow-up study was performed to investigate the stability of IQ measures in a group of dyslexic teenagers and young adults. Earlier research had shown contradictory results. The 65 subjects, 12 years old on the average at first test, were retested after a mean interval of six and a half years. There was a significant relative decrease in…
Descriptors: Learning Disabilities, Dyslexia, Intelligence Tests, Intelligence Quotient
Download full textEmanuelsson, Ingemar; Svensson, Allan – 1985
This study investigated possible changes in verbal, spatial, and reasoning intelligence in Swedish 13-year-olds over a 20-year period. The first sample included about 12,000 students born in 1948. Data consisted of (1) information from school records, (2) information on personal background, (3) scores on three intelligence tests and three…
Descriptors: Cognitive Ability, Cognitive Measurement, Cultural Influences, Curriculum
