Use of Item Response Theory to Examine a Cardiovascular Health Knowledge Measure for Adolescents with Elevated Blood Pressure
The purpose of this study was to assess the psychometric properties of a cardiovascular health knowledge measure for adolescents using item response theory. The measure was developed in the context of a cardiovascular lifestyle intervention for adolescents with elevated blood pressure. Sample consis...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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University of Arizona Libraries
2012-10-01
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| Series: | Journal of Methods and Measurement in the Social Sciences |
| Subjects: | |
| Online Access: | https://journals.uair.arizona.edu/index.php/jmmss/article/view/16111 |
| _version_ | 1818515002240270336 |
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| author | Stephanie L. Fitzpatrick Patrick G. Saab Maria M. Llabre Randall Penfield Judith R. McCalla Neil Schneiderman |
| author_facet | Stephanie L. Fitzpatrick Patrick G. Saab Maria M. Llabre Randall Penfield Judith R. McCalla Neil Schneiderman |
| author_sort | Stephanie L. Fitzpatrick |
| collection | DOAJ |
| description | The purpose of this study was to assess the psychometric properties of a cardiovascular health knowledge measure for adolescents using item response theory. The measure was developed in the context of a cardiovascular lifestyle intervention for adolescents with elevated blood pressure. Sample consisted of 167 adolescents (mean age = 16.2 years) who completed the Cardiovascular Health Knowledge Assessment (CHKA), a 34-item multiple choice test, at baseline and post-intervention. The CHKA was unidimensional and internal consistency was .65 at pretest and .74 at posttest. Rasch analysis results indicated that at pretest the items targeted adolescents with variable levels of health knowledge. However, based on results at posttest, additional hard items are needed to account for the increase in level of cardiovascular health knowledge at post-intervention. Change in knowledge scores was examined using Rasch analysis. Findings indicated there was significant improvement in health knowledge over time [t(119) = -10.3, p .0001]. In summary, the CHKA appears to contain items that are good approximations of the construct cardiovascular health knowledge and items that target adolescents with moderate levels of knowledge.
DOI:10.2458/azu_jmmss_v3i1_fitzpatrick |
| first_indexed | 2024-12-11T00:23:20Z |
| format | Article |
| id | doaj.art-5c32508aef234ee4b792f4628be6c273 |
| institution | Directory Open Access Journal |
| issn | 2159-7855 |
| language | English |
| last_indexed | 2024-12-11T00:23:20Z |
| publishDate | 2012-10-01 |
| publisher | University of Arizona Libraries |
| record_format | Article |
| series | Journal of Methods and Measurement in the Social Sciences |
| spelling | doaj.art-5c32508aef234ee4b792f4628be6c2732022-12-22T01:27:39ZengUniversity of Arizona LibrariesJournal of Methods and Measurement in the Social Sciences2159-78552012-10-0131274810.2458/v3i1.1611115969Use of Item Response Theory to Examine a Cardiovascular Health Knowledge Measure for Adolescents with Elevated Blood PressureStephanie L. Fitzpatrick0Patrick G. Saab1Maria M. Llabre2Randall Penfield3Judith R. McCalla4Neil Schneiderman5University of Miami, Miami, FLUniversity of Miami, Miami, FLUniversity of Miami, Miami, FLUniversity of Miami, Miami, FLUniversity of Miami, Miami, FLUniversity of Miami, Miami, FLThe purpose of this study was to assess the psychometric properties of a cardiovascular health knowledge measure for adolescents using item response theory. The measure was developed in the context of a cardiovascular lifestyle intervention for adolescents with elevated blood pressure. Sample consisted of 167 adolescents (mean age = 16.2 years) who completed the Cardiovascular Health Knowledge Assessment (CHKA), a 34-item multiple choice test, at baseline and post-intervention. The CHKA was unidimensional and internal consistency was .65 at pretest and .74 at posttest. Rasch analysis results indicated that at pretest the items targeted adolescents with variable levels of health knowledge. However, based on results at posttest, additional hard items are needed to account for the increase in level of cardiovascular health knowledge at post-intervention. Change in knowledge scores was examined using Rasch analysis. Findings indicated there was significant improvement in health knowledge over time [t(119) = -10.3, p .0001]. In summary, the CHKA appears to contain items that are good approximations of the construct cardiovascular health knowledge and items that target adolescents with moderate levels of knowledge. DOI:10.2458/azu_jmmss_v3i1_fitzpatrickhttps://journals.uair.arizona.edu/index.php/jmmss/article/view/16111health knowledge, item response theory, classical test theory, confirmatory factor analysis, adolescents |
| spellingShingle | Stephanie L. Fitzpatrick Patrick G. Saab Maria M. Llabre Randall Penfield Judith R. McCalla Neil Schneiderman Use of Item Response Theory to Examine a Cardiovascular Health Knowledge Measure for Adolescents with Elevated Blood Pressure Journal of Methods and Measurement in the Social Sciences health knowledge, item response theory, classical test theory, confirmatory factor analysis, adolescents |
| title | Use of Item Response Theory to Examine a Cardiovascular Health Knowledge Measure for Adolescents with Elevated Blood Pressure |
| title_full | Use of Item Response Theory to Examine a Cardiovascular Health Knowledge Measure for Adolescents with Elevated Blood Pressure |
| title_fullStr | Use of Item Response Theory to Examine a Cardiovascular Health Knowledge Measure for Adolescents with Elevated Blood Pressure |
| title_full_unstemmed | Use of Item Response Theory to Examine a Cardiovascular Health Knowledge Measure for Adolescents with Elevated Blood Pressure |
| title_short | Use of Item Response Theory to Examine a Cardiovascular Health Knowledge Measure for Adolescents with Elevated Blood Pressure |
| title_sort | use of item response theory to examine a cardiovascular health knowledge measure for adolescents with elevated blood pressure |
| topic | health knowledge, item response theory, classical test theory, confirmatory factor analysis, adolescents |
| url | https://journals.uair.arizona.edu/index.php/jmmss/article/view/16111 |
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