Psychometric evaluation of the cognitive state test (COST) in a sample of Iranian elderly people
Background: An absolute prerequisite to the effective management of dementia is its early diagnosis. Successful dementia screening requires precise and sensitive instruments that can be completed even by illiterate elderly people. Objectives: The aim of this study was to evaluate the psychometric pr...
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| Veröffentlicht in: | Iranian red crescent medical journal 2016-05, Vol.18 (5), p.1-8 |
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| creator | Sharifi, Khadijah Tagharrubi, Zahra Lutfi, Muhammad Sajjad Abu al-Husni, Javad |
| description | Background: An absolute prerequisite to the effective management of dementia is its early diagnosis. Successful dementia screening requires precise and sensitive instruments that can be completed even by illiterate elderly people.
Objectives: The aim of this study was to evaluate the psychometric properties of the Persian version of the cognitive state test (COST).
Materials and Methods: This methodologic study was conducted in Kashan, Iran, during 2013 - 2014. A purposeful sample of 150 healthy elderly people and 50 elderly patients with dementia was recruited. After translating the instrument by using the standard forward-backward technique, we assessed its qualitative and quantitative face and content validity. The validity of the test was assessed by using the concurrent validity and the exploratory factor analysis. We also calculated Cronbach’s alpha and employed the test-retest method for evaluating the internal consistency and the stability of the test, respectively. Study data were analyzed by using the SPSS v16.0, the Spearman-Brown, and the intraclass correlation coefficient tests and the principal components factor analysis with varimax rotation.
Results: The Persian COST consists of nineteen items. The impact scores, the content validity ratios and the content validity indices of all test items were greater than 4.5, 0.69, and 0.84, respectively. The COST had a significant correlation with the clinical dementia rating (rS = -0.76, P value < 0.001), indicating an acceptable concurrent validity for the test. The exploratory factor analysis revealed a five-factor structure that explained 60.59% of the total variance of the total cognitive state score. The Cronbach’s alpha, Spearman-Brown, and interclass correlation coefficients were 0.82, 0.95, and 0.88, respectively (P value < 0.001).
Conclusions: The Persian version of the COST can be used as a valid and reliable instrument for assessing cognitive state and screening dementia in literate and illiterate elderly people. |
| doi_str_mv | 10.5812/ircmj.23786 |
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Objectives: The aim of this study was to evaluate the psychometric properties of the Persian version of the cognitive state test (COST).
Materials and Methods: This methodologic study was conducted in Kashan, Iran, during 2013 - 2014. A purposeful sample of 150 healthy elderly people and 50 elderly patients with dementia was recruited. After translating the instrument by using the standard forward-backward technique, we assessed its qualitative and quantitative face and content validity. The validity of the test was assessed by using the concurrent validity and the exploratory factor analysis. We also calculated Cronbach’s alpha and employed the test-retest method for evaluating the internal consistency and the stability of the test, respectively. Study data were analyzed by using the SPSS v16.0, the Spearman-Brown, and the intraclass correlation coefficient tests and the principal components factor analysis with varimax rotation.
Results: The Persian COST consists of nineteen items. The impact scores, the content validity ratios and the content validity indices of all test items were greater than 4.5, 0.69, and 0.84, respectively. The COST had a significant correlation with the clinical dementia rating (rS = -0.76, P value < 0.001), indicating an acceptable concurrent validity for the test. The exploratory factor analysis revealed a five-factor structure that explained 60.59% of the total variance of the total cognitive state score. The Cronbach’s alpha, Spearman-Brown, and interclass correlation coefficients were 0.82, 0.95, and 0.88, respectively (P value < 0.001).
Conclusions: The Persian version of the COST can be used as a valid and reliable instrument for assessing cognitive state and screening dementia in literate and illiterate elderly people.</description><identifier>ISSN: 2074-1804</identifier><identifier>EISSN: 2074-1812</identifier><identifier>DOI: 10.5812/ircmj.23786</identifier><identifier>PMID: 27478627</identifier><language>eng</language><publisher>Dubai, United Arab Emirates: Iranian Hospital</publisher><subject>Cognitive psychology ; Dementia ; Diagnosis ; Evaluation ; Older people ; Psychological tests ; Psychology ; Psychometrics ; التشخيص ; التقييم ; القياس النفسي ; علم النفس ; علم النفس المعرفي</subject><ispartof>Iranian red crescent medical journal, 2016-05, Vol.18 (5), p.1-8</ispartof><rights>Copyright Iranian Hospital Dubai May 2016</rights><rights>Copyright © 2016, Iranian Red Crescent Medical Journal 2016</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c431t-dde55ebb876d2e4de0ecdfafd079462391c5d1c45c51763d5321431d466a99923</citedby><cites>FETCH-LOGICAL-c431t-dde55ebb876d2e4de0ecdfafd079462391c5d1c45c51763d5321431d466a99923</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC4948255/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC4948255/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,727,780,784,885,27924,27925,53791,53793</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/27478627$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Sharifi, Khadijah</creatorcontrib><creatorcontrib>Tagharrubi, Zahra</creatorcontrib><creatorcontrib>Lutfi, Muhammad Sajjad</creatorcontrib><creatorcontrib>Abu al-Husni, Javad</creatorcontrib><title>Psychometric evaluation of the cognitive state test (COST) in a sample of Iranian elderly people</title><title>Iranian red crescent medical journal</title><addtitle>Iran Red Crescent Med J</addtitle><description>Background: An absolute prerequisite to the effective management of dementia is its early diagnosis. Successful dementia screening requires precise and sensitive instruments that can be completed even by illiterate elderly people.
Objectives: The aim of this study was to evaluate the psychometric properties of the Persian version of the cognitive state test (COST).
Materials and Methods: This methodologic study was conducted in Kashan, Iran, during 2013 - 2014. A purposeful sample of 150 healthy elderly people and 50 elderly patients with dementia was recruited. After translating the instrument by using the standard forward-backward technique, we assessed its qualitative and quantitative face and content validity. The validity of the test was assessed by using the concurrent validity and the exploratory factor analysis. We also calculated Cronbach’s alpha and employed the test-retest method for evaluating the internal consistency and the stability of the test, respectively. Study data were analyzed by using the SPSS v16.0, the Spearman-Brown, and the intraclass correlation coefficient tests and the principal components factor analysis with varimax rotation.
Results: The Persian COST consists of nineteen items. The impact scores, the content validity ratios and the content validity indices of all test items were greater than 4.5, 0.69, and 0.84, respectively. The COST had a significant correlation with the clinical dementia rating (rS = -0.76, P value < 0.001), indicating an acceptable concurrent validity for the test. The exploratory factor analysis revealed a five-factor structure that explained 60.59% of the total variance of the total cognitive state score. The Cronbach’s alpha, Spearman-Brown, and interclass correlation coefficients were 0.82, 0.95, and 0.88, respectively (P value < 0.001).
Conclusions: The Persian version of the COST can be used as a valid and reliable instrument for assessing cognitive state and screening dementia in literate and illiterate elderly people.</description><subject>Cognitive psychology</subject><subject>Dementia</subject><subject>Diagnosis</subject><subject>Evaluation</subject><subject>Older people</subject><subject>Psychological tests</subject><subject>Psychology</subject><subject>Psychometrics</subject><subject>التشخيص</subject><subject>التقييم</subject><subject>القياس النفسي</subject><subject>علم النفس</subject><subject>علم النفس المعرفي</subject><issn>2074-1804</issn><issn>2074-1812</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><sourceid>8G5</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNpdkd1rVDEQxYMotlaffFYCvlRkaz5vbl4EWfwoFCpYn2M2mdvNcm-yJrkL-9-bduuiPmWY-WU4cw5CLym5kD1l70N20-aCcdV3j9ApI0osaOs_PtZEnKBnpWwIkbpj_Ck6YUo0mqlT9PNb2bt1mqDm4DDs7DjbGlLEacB1Ddil2xhq2AEu1VbAFUrF58vr7zdvcYjY4mKn7Qh3-GW2MdiIYfSQxz3eQmqT5-jJYMcCLx7eM_Tj86eb5dfF1fWXy-XHq4UTnNaF9yAlrFa96jwD4YGA84MdPFFaNNGaOumpE9JJqjruJWe0ffSi66zWmvEz9OGwdzuvJvAOYs12NNscJpv3Jtlg_p3EsDa3aWeEFj2Tsi04f1iQ06-5nWmmUByMo42Q5mKajz1vvird0Df_oZs059jOM1RppiSRlDfq3YFyOZWSYTiKocTcJWfukzP3yTX69d_6j-yfqBrw6gBA68Ngj0TXDNKc_wb53Z88</recordid><startdate>20160501</startdate><enddate>20160501</enddate><creator>Sharifi, Khadijah</creator><creator>Tagharrubi, Zahra</creator><creator>Lutfi, Muhammad Sajjad</creator><creator>Abu al-Husni, Javad</creator><general>Iranian Hospital</general><general>Zamen Salamati Publishing</general><general>Kowsar</general><scope>AACQA</scope><scope>ADJCN</scope><scope>AEION</scope><scope>AGZBS</scope><scope>AHFXO</scope><scope>AHHHR</scope><scope>AHMDM</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7X7</scope><scope>7XB</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>8G5</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>CCPQU</scope><scope>CWDGH</scope><scope>DWQXO</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>K9.</scope><scope>M0S</scope><scope>M2O</scope><scope>MBDVC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>Q9U</scope><scope>7X8</scope><scope>5PM</scope></search><sort><creationdate>20160501</creationdate><title>Psychometric evaluation of the cognitive state test (COST) in a sample of Iranian elderly people</title><author>Sharifi, Khadijah ; Tagharrubi, Zahra ; Lutfi, Muhammad Sajjad ; Abu al-Husni, Javad</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c431t-dde55ebb876d2e4de0ecdfafd079462391c5d1c45c51763d5321431d466a99923</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Cognitive psychology</topic><topic>Dementia</topic><topic>Diagnosis</topic><topic>Evaluation</topic><topic>Older people</topic><topic>Psychological tests</topic><topic>Psychology</topic><topic>Psychometrics</topic><topic>التشخيص</topic><topic>التقييم</topic><topic>القياس النفسي</topic><topic>علم النفس</topic><topic>علم النفس المعرفي</topic><toplevel>online_resources</toplevel><creatorcontrib>Sharifi, Khadijah</creatorcontrib><creatorcontrib>Tagharrubi, Zahra</creatorcontrib><creatorcontrib>Lutfi, Muhammad Sajjad</creatorcontrib><creatorcontrib>Abu al-Husni, Javad</creatorcontrib><collection>بنك معلومات "معرفة" لدراسات العلوم العسكرية والأمنية - e-Marefa Military & Security Database</collection><collection>الدوريات العلمية والإحصائية - e-Marefa Academic and Statistical Periodicals</collection><collection>مجلس التعاون الخليجي وإيران - e-Marefa The GCC-Iranian Affairs</collection><collection>قاعدة العلوم الاجتماعية - e-Marefa Social Sciences</collection><collection>معرفة - المحتوى العربي الأكاديمي المتكامل - e-Marefa Academic Complete</collection><collection>دراسات الشرق الأوسط - e-Marefa Middle Eastern Studies</collection><collection>قاعدة العلوم الإنسانية - e-Marefa Humanities</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Health & Medical Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Hospital Premium Collection</collection><collection>Hospital Premium Collection (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>ProQuest One Community College</collection><collection>Middle East & Africa Database</collection><collection>ProQuest Central Korea</collection><collection>Health Research Premium Collection</collection><collection>Health Research Premium Collection (Alumni)</collection><collection>ProQuest Central Student</collection><collection>Research Library Prep</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>Health & Medical Collection (Alumni Edition)</collection><collection>Research Library</collection><collection>Research Library (Corporate)</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>ProQuest Central Basic</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Iranian red crescent medical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sharifi, Khadijah</au><au>Tagharrubi, Zahra</au><au>Lutfi, Muhammad Sajjad</au><au>Abu al-Husni, Javad</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Psychometric evaluation of the cognitive state test (COST) in a sample of Iranian elderly people</atitle><jtitle>Iranian red crescent medical journal</jtitle><addtitle>Iran Red Crescent Med J</addtitle><date>2016-05-01</date><risdate>2016</risdate><volume>18</volume><issue>5</issue><spage>1</spage><epage>8</epage><pages>1-8</pages><issn>2074-1804</issn><eissn>2074-1812</eissn><abstract>Background: An absolute prerequisite to the effective management of dementia is its early diagnosis. Successful dementia screening requires precise and sensitive instruments that can be completed even by illiterate elderly people.
Objectives: The aim of this study was to evaluate the psychometric properties of the Persian version of the cognitive state test (COST).
Materials and Methods: This methodologic study was conducted in Kashan, Iran, during 2013 - 2014. A purposeful sample of 150 healthy elderly people and 50 elderly patients with dementia was recruited. After translating the instrument by using the standard forward-backward technique, we assessed its qualitative and quantitative face and content validity. The validity of the test was assessed by using the concurrent validity and the exploratory factor analysis. We also calculated Cronbach’s alpha and employed the test-retest method for evaluating the internal consistency and the stability of the test, respectively. Study data were analyzed by using the SPSS v16.0, the Spearman-Brown, and the intraclass correlation coefficient tests and the principal components factor analysis with varimax rotation.
Results: The Persian COST consists of nineteen items. The impact scores, the content validity ratios and the content validity indices of all test items were greater than 4.5, 0.69, and 0.84, respectively. The COST had a significant correlation with the clinical dementia rating (rS = -0.76, P value < 0.001), indicating an acceptable concurrent validity for the test. The exploratory factor analysis revealed a five-factor structure that explained 60.59% of the total variance of the total cognitive state score. The Cronbach’s alpha, Spearman-Brown, and interclass correlation coefficients were 0.82, 0.95, and 0.88, respectively (P value < 0.001).
Conclusions: The Persian version of the COST can be used as a valid and reliable instrument for assessing cognitive state and screening dementia in literate and illiterate elderly people.</abstract><cop>Dubai, United Arab Emirates</cop><pub>Iranian Hospital</pub><pmid>27478627</pmid><doi>10.5812/ircmj.23786</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Cognitive psychology Dementia Diagnosis Evaluation Older people Psychological tests Psychology Psychometrics التشخيص التقييم القياس النفسي علم النفس علم النفس المعرفي |
| title | Psychometric evaluation of the cognitive state test (COST) in a sample of Iranian elderly people |
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