Show simple item record

dc.contributor.advisorStrand, Paul
dc.creatorHampton, Justin Samuel
dc.date.accessioned2017-06-19T17:40:45Z
dc.date.available2017-06-19T17:40:45Z
dc.date.issued2016
dc.identifier.urihttp://hdl.handle.net/2376/12040
dc.descriptionThesis (Ph.D.), Psychology - Clinical, Washington State Universityen_US
dc.description.abstractThe present study investigated whether the diagnostic validity of a poorly-performing instrument (the Gilliam Autism Rating Scale – Second Edition, or the GARS-2) designed to screen for autism spectrum disorders could be improved through item content manipulation (via altering the weighting of items and including new items). In previous studies, the GARS-2 has been shown to have poor sensitivity and specificity. Item content manipulations were theory-based, and involved efforts to align item content with existing diagnostic criteria and with the item content of frequently utilized criterion instruments [e.g., the Autism Diagnostic Observation Schedule (ADOS)]. Consistent with expectations, results revealed that by reweighting items to mirror the ADOS and diagnostic criteria distributions, and by including items that assess executive functioning deficits, the sensitivity and specificity could be significantly improved. These results have implications for (a) improving the validity of a currently available instrument, and (b) developing instruments with high diagnostic validity in the future. These findings are timely, given that the recent advent of the DSM-5 (and the new autism diagnostic criteria it contains) necessitates the development of new screening instruments or the modification of existing ones.en_US
dc.description.sponsorshipWashington State University, Psychology - Clinicalen_US
dc.language.isoEnglish
dc.rightsIn copyright
dc.rightsPublicly accessible
dc.rightsopenAccess
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.rights.urihttp://www.ndltd.org/standards/metadata
dc.rights.urihttp://purl.org/eprint/accessRights/OpenAccess
dc.subjectPsychologyen_US
dc.subjectDevelopmental psychologyen_US
dc.subjectAssessmenten_US
dc.subjectAutismen_US
dc.subjectDiagnosisen_US
dc.subjectDiagnostic Validityen_US
dc.subjectRating Scalesen_US
dc.subjectScreeningen_US
dc.titleAn Investigation of the Relationship Between the Item-Content and Diagnostic Validity of an Autism Screening Instrument
dc.typeElectronic Thesis or Dissertation


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record