Differences in visual orienting between persons with Down or fragile X syndrome

Tara Flanagan, James T. Enns, Melissa M. Murphy, Natalie Russo, Leonard Abbeduto, Beth Randolph, Jacob A. Burack

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


The voluntary and reflexive orienting abilities of persons with Down syndrome and fragile X syndrome, at average MA levels of approximately 4 and 7 years, were compared with an RT task. Reflexive orienting abilities appeared to develop in accordance with MA for the participants with Down syndrome but not for those with fragile X syndrome. However, both groups showed delayed voluntary orienting. The group differences in reflexive orienting at the low MA level reinforce the practice of separating etiologies and highlight the contribution of rudimentary attentional processes in the study of individuals with mental retardation.

Original languageEnglish (US)
Pages (from-to)128-134
Number of pages7
JournalBrain and Cognition
Issue number1
StatePublished - Oct 2007
Externally publishedYes


  • Attention
  • Down syndrome
  • Fragile X syndrome
  • Mental retardation
  • Visual orienting

ASJC Scopus subject areas

  • Neuropsychology and Physiological Psychology
  • Experimental and Cognitive Psychology
  • Developmental and Educational Psychology
  • Arts and Humanities (miscellaneous)
  • Cognitive Neuroscience


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