Using the Rasch Model for Psychometric Examination of Food Security and Acculturation Surveys

2.50
Hdl Handle:
http://hdl.handle.net/10755/304340
Category:
Full-text
Type:
Presentation
Title:
Using the Rasch Model for Psychometric Examination of Food Security and Acculturation Surveys
Author(s):
Kilanowski, Jill Francesca
Lead Author STTI Affiliation:
Alpha Zeta
Author Details:
Jill Francesca Kilanowski, PhD, MSN, BSN, APRN, CPNP, jill.kilanowski@gmail.com
Abstract:

Session presented on: Thursday, July 25, 2013

Purpose:

Rasch model is used to obtain measurements from two categorical variables to assess the probability of a specified response as a function of person and item parameters. That is the probability of a correct response is a logistic function of the difference between the person and item parameter item. The higher level of a person's ability relative to the difficulty of an item, the higher the probability of a correct response on that item. Rasch models have general applicablity and are used in psychometrics to evaluate theory and technique of measurement. The purpose of the study was to evalute the use of the Rasch model on measures of food security and accuturation. The examplar discussed will be the short-version USDA Household Food Security Survey Module (HFSSM) and the Short Acculturation Scale for Hispanics (SASH) in a Latino Midwest USA migrant farmworker population

Methods:

Using 'Winsteps software, we assessed: HFSSM structure, item severity levels, and fitness of sample population. We explored the invariance of HFSSM response through differential item functioning (DIF) analysis patterns between less/more acculturated households

Results:

With a convenience sample of n = 112, 97% migrant mothers, results of item infit scores were within adequate range (0.7 to 1.3). The data showed a balanced spread and cohesive order. The item infit statistics showed no substantial deviation from expectations for all the items. The mean item infit score was 0.97 which were close to perfect fit of 1 and 0. The unidimensionality structure of the HFSSM theoretical framework was supported with item severity scores. Food security score was not significantly correlated with acculturation (r = -0.10, p = 0.307). '

Conclusion:

Rasch modeling was able to demonstrate the adapted HFSSM performed in agreement with the theoretical framework of food insecurity. The Rasch model was easy to use and interpretation of data was straightforward.

Keywords:
Rasch models; acculturation; food security
Repository Posting Date:
22-Oct-2013
Date of Publication:
22-Oct-2013 ; 22-Oct-2013
Conference Date:
2013
Conference Name:
24th International Nursing Research Congress
Conference Host:
Sigma Theta Tau International, the Honor Society of Nursing
Conference Location:
Prague, Czech Republic
Description:
24th International Nursing Research Congress Theme: Bridge the Gap Between Research and Practice Through Collaboration. Held at the Hilton Prague Hotel.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_GB
dc.language.isoenen
dc.type.categoryFull-texten
dc.typePresentationen
dc.titleUsing the Rasch Model for Psychometric Examination of Food Security and Acculturation Surveysen
dc.contributor.authorKilanowski, Jill Francescaen
dc.contributor.departmentAlpha Zetaen
dc.author.detailsJill Francesca Kilanowski, PhD, MSN, BSN, APRN, CPNP, jill.kilanowski@gmail.comen
dc.identifier.urihttp://hdl.handle.net/10755/304340-
dc.description.abstract<p>Session presented on: Thursday, July 25, 2013</p><b>Purpose: </b> <p>Rasch model is used to obtain measurements from two categorical variables to assess the probability of a specified response as a function of person and item parameters. That is the probability of a correct response is a logistic function of the difference between the person and item parameter item. The higher level of a person's ability relative to the difficulty of an item, the higher the probability of a correct response on that item. Rasch models have general applicablity and are used in psychometrics to evaluate theory and technique of measurement. The purpose of the study was to evalute the use of the Rasch model on measures of food security and accuturation. The examplar discussed will be the short-version USDA Household Food Security Survey Module (HFSSM) and the Short Acculturation Scale for Hispanics (SASH) in a Latino Midwest USA migrant farmworker population <p><b>Methods: </b> <p>Using '<i>Winsteps</i> software, we assessed: HFSSM structure, item severity levels, and fitness of sample population. We explored the invariance of HFSSM response through differential item functioning (DIF) analysis patterns between less/more acculturated households <p><b>Results: </b> <p>With a convenience sample of <i>n</i> = 112, 97% migrant mothers, results of item infit scores were within adequate range (0.7 to 1.3). The data showed a balanced spread and cohesive order. The item infit statistics showed no substantial deviation from expectations for all the items. The mean item infit score was 0.97 which were close to perfect fit of 1 and 0. The unidimensionality structure of the HFSSM theoretical framework was supported with item severity scores. Food security score was not significantly correlated with acculturation (<i>r </i>= -0.10, <i>p</i> = 0.307). ' <p><b>Conclusion: </b> <p>Rasch modeling was able to demonstrate the adapted HFSSM performed in agreement with the theoretical framework of food insecurity. The Rasch model was easy to use and interpretation of data was straightforward.en
dc.subjectRasch modelsen
dc.subjectacculturationen
dc.subjectfood securityen
dc.date.available2013-10-22T20:33:53Z-
dc.date.issued2013-10-22-
dc.date.issued2013-10-22en
dc.date.accessioned2013-10-22T20:33:53Z-
dc.conference.date2013en
dc.conference.name24th International Nursing Research Congressen
dc.conference.hostSigma Theta Tau International, the Honor Society of Nursingen
dc.conference.locationPrague, Czech Republicen
dc.description24th International Nursing Research Congress Theme: Bridge the Gap Between Research and Practice Through Collaboration. Held at the Hilton Prague Hotel.en
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