The purpose of this study is to evaluate construct stability of the same certification test taken at different points in a test taker's career, taking into account changes is experience over time. A single medical certification exam administration was used to analyze the construct stability of the certification exam across testing cohorts at varied stages in their medical careers. The Rasch model was used for item analysis to calibrate the difficulty hierarchy of the exam items for each cohort. Correlations between the item difficulty hierarchies for each cohort supported the overall construct stability of the certification exam. Individual item function for each cohort was analyzed through a differential item functioning (DIF) procedure, which showed less than 5% overall DIF, again supporting the construct stability of the examination. The support for the stability of the construct measured by the exam is a necessary condition in the process establishing the validity of the exam, making the information in this study valuable for a variety of testing implications.
","abstract_html":"<p>The purpose of this study is to evaluate construct stability of the same certification test taken at different points in a test taker's career, taking into account changes is experience over time. A single medical certification exam administration was used to analyze the construct stability of the certification exam across testing cohorts at varied stages in their medical careers. The Rasch model was used for item analysis to calibrate the difficulty hierarchy of the exam items for each cohort. Correlations between the item difficulty hierarchies for each cohort supported the overall construct stability of the certification exam. Individual item function for each cohort was analyzed through a differential item functioning (DIF) procedure, which showed less than 5% overall DIF, again supporting the construct stability of the examination. The support for the stability of the construct measured by the exam is a necessary condition in the process establishing the validity of the exam, making the information in this study valuable for a variety of testing implications.</p>","abstract_has_math":false,"creators":["Kinney, Deborah L."],"institution":"Eastern Kentucky University","degree_name":"Master of Science (MS)","degree_level":"Master's","degree_discipline":"Psychology","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-01-01T08:00:00Z","date_published":"2011-01-01T08:00:00Z","updated_at":"2026-07-24T02:15:13Z","subjects":["Quantitative Psychology"],"languages":[],"rights":["Copyright 2011 Deborah L. Kinney"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://encompass.eku.edu/etd/15","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Kinney, Deborah L."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.available","label":"Dc Date Available","values":["2012-05-06T07:00:00Z"]},{"key":"dc:publisher","label":"Institution","values":["Encompass Digital Archive, Eastern Kentucky University"]},{"key":"dc:type","label":"Dc Type","values":["Master Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Psychology"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Master's"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science (MS)"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Eastern Kentucky University"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Quantitative Psychology"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2011 Deborah L. Kinney"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://encompass.eku.edu/etd/15"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The purpose of this study is to evaluate construct stability of the same certification test taken at different points in a test taker's career, taking into account changes is experience over time. A single medical certification exam administration was used to analyze the construct stability of the certification exam across testing cohorts at varied stages in their medical careers. The Rasch model was used for item analysis to calibrate the difficulty hierarchy of the exam items for each cohort. Correlations between the item difficulty hierarchies for each cohort supported the overall construct stability of the certification exam. Individual item function for each cohort was analyzed through a differential item functioning (DIF) procedure, which showed less than 5% overall DIF, again supporting the construct stability of the examination. The support for the stability of the construct measured by the exam is a necessary condition in the process establishing the validity of the exam, making the information in this study valuable for a variety of testing implications.
"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:source","label":"Dc Source","values":["Encompass Digital Archive: Online Theses and Dissertations"]},{"key":"dc:title","label":"Title","values":["Examining Construct Stability Across Career Stage Cohorts"]}]}],"canonical_facts":{"dc:creator":["Kinney, Deborah L."],"dc:date.available":["2012-05-06T07:00:00Z"],"dc:description.abstract":["The purpose of this study is to evaluate construct stability of the same certification test taken at different points in a test taker's career, taking into account changes is experience over time. A single medical certification exam administration was used to analyze the construct stability of the certification exam across testing cohorts at varied stages in their medical careers. The Rasch model was used for item analysis to calibrate the difficulty hierarchy of the exam items for each cohort. Correlations between the item difficulty hierarchies for each cohort supported the overall construct stability of the certification exam. Individual item function for each cohort was analyzed through a differential item functioning (DIF) procedure, which showed less than 5% overall DIF, again supporting the construct stability of the examination. The support for the stability of the construct measured by the exam is a necessary condition in the process establishing the validity of the exam, making the information in this study valuable for a variety of testing implications.
"],"dc:format":["application/pdf"],"dc:identifier":["https://encompass.eku.edu/etd/15"],"dc:publisher":["Encompass Digital Archive, Eastern Kentucky University"],"dc:rights":["Copyright 2011 Deborah L. Kinney"],"dc:source":["Encompass Digital Archive: Online Theses and Dissertations"],"dc:subject":["Quantitative Psychology"],"dc:title":["Examining Construct Stability Across Career Stage Cohorts"],"dc:type":["Master Thesis"],"thesis:degree_discipline":["Psychology"],"thesis:degree_level":["Master's"],"thesis:degree_name":["Master of Science (MS)"],"thesis:institution_name":["Eastern Kentucky University"]},"updated_at":"2026-07-24T02:15:13Z"}