Biomedical subjects

R K Parrila

Publications and source records attributed to R K Parrila.

3 recordsLinked to original sources

PubMed1999

Quantitative analyses of schooling effects on executive function in young children.

Developmental studies have demonstrated the utility of select executive function (EF) tasks for the early diagnosis of specific learning-related problems (e.g., Snow, 1998). However, previous data demonstrating schooling effects on EF measures suggests potential pitfalls in clinical interpretation. In the present study three common EF measures, (Wisconsin Card Sort, Thurstone Word Fluency, and a mazes task) in addition to a VIQ estimating task, were administered to a cross-section of 115 children aged 7 to 9. Using a school-entrance cut-off design the unique contributions of formal schooling versus age-related changes to performance on the EF measures were examined. Schooling effects were both task and age-dependent supporting the conclusion that the proper use of EF measures with children in this age range depends upon consideration of factors beyond that usually depicted in net-effect models.

Age Factors↗

PubMed1997

Gender differences in abused children with and without disabilities.

OBJECTIVE: Two questions were posed: (1) What are the proportions of boys and girls in various categories of substantiated child abuse? (2) Do the gender proportions differ for children with and without disabilities? METHOD: Data collected by previous researchers from a demographically representative sample of U.S. child abuse reporting districts was analyzed. This included 1,249 case files involving 1,834 children. The number of girls and boys who did and did not have disabilities was identified for three age categories and for several categories of abuse. Chi-square analyses were used to determine whether there was a relationship between disability and gender for the various age and abuse categories. RESULTS: More boys were physically abused and neglected, but more girls were sexually abused. Boys with disabilities, however, were over-represented in all categories of abuse. Moreover, gender proportions among abused children with disabilities differed significantly from those found among other abused children. Although slightly more than half of abused children without disabilities were girls, 65% of abused children with disabilities were boys. CONCLUSIONS: Boys represented a significantly larger proportion of physically abused, sexually abused, and neglected children with disabilities than would be expected from their respective proportion of abused and neglected children without disabilities. Several possible explanations for the observed gender and disability status interaction are discussed.

Adolescent↗

PubMedDate not supplied

Cognitive decline due to aging among persons with Down syndrome.

This study examined decline in cognitive functions in individuals with Down syndrome (DS) over the age of 40 in comparison to participants of the same age and comparable mental handicap without Down syndrome (NonDS). Both DS (n = 32) and NonDS (n = 31) samples were divided into "younger" (40-49 years) and "older" (50-62) groups. Cognitive processes were examined by tests of general intellectual functioning (Dementia Rating Scale, Peabody Picture Vocabulary Test-Revised, and the Matrix Analogies Test-Expanded form), as well as planning, attention, simultaneous, and successive processing tests taken from Das-Naglieri Cognitive Assessment System. The older individuals with Down syndrome performed more poorly than those in the other three groups. The differences were particularly evident in tasks requiring planning and attention. The possibility of using these tests as indicators of the early signs of Alzheimer's disease is discussed.

Adult↗