Articulation and Non Comprehension Signaling in Adolescent and Adult Males with Down Syndrome and Fragile X Syndrome
By: Larissa Ann Fedak
Published: 05/16/2012
Uploaded: 11/08/2017
Uploaded by: Pocket Masters
Pockets: 2012 (May) Teachers College Columbia University Ed.D. Dissertations, Gottesman Libraries Archive, Historical Dissertations
Tags: Articulation, Down syndrome, Fragile X Syndrome, intellectual disability, nonc omprehension signaling

Description/Abstract: The purpose of this study was to determine whether or not decreased articulation
of speech played a role in the ability of an individual with Down syndrome or Fragile X
syndrome to signal noncomprehension and whether the two groups differed in their levels
of articulation of speech and noncomprehension signaling ability. The research was
conducted using a group comparison design with two independent groups. The
independent variable was the diagnosis of either Down syndrome or Fragile X syndrome,
and the dependent variables were the articulation of speech and noncomprehension signaling

The study was conducted in New York, New Jersey, Connecticut, Massachusetts,
Delaware, Maryland, and Virginia, with 36 male participants, 18 each with Down
syndrome and Fragile X syndrome. A screening assessment confirmed that the
participants could hear within normal limits and that they were able to sit and attend and
follow simple directives. Performance on a receptive and expressive language assessment
indicated that the groups did not differ significantly in their vocabulary and language
abilities. The dependent variables of primary interest included a number of errors on an
articulation test, given to determine the quality of speech for each participant, and a number of
noncomprehension signals on a noncomprehension signaling task, which was
administered to determine if the participants could ask for clarification when unclear
directions were presented to them.
Results indicated that there was a significant relationship between articulation of
speech, as measured by articulation errors, and noncomprehension signaling for both
groups combined and for the DS group, but not for the FXS group. Results also indicated
that, although articulation of speech was not significantly different in males with DS and
FXS, males with DS were more likely to noncomprehension signal than males with FXS.