scholarly journals Item Response Theory Analysis of Two Questionnaire Measures of Arthritis-Related Self-Efficacy Beliefs from Community-Based US Samples

Arthritis ◽  
2010 ◽  
Vol 2010 ◽  
pp. 1-8 ◽  
Author(s):  
Thelma J. Mielenz ◽  
Michael C. Edwards ◽  
Leigh F. Callahan
Keyword(s):  
Item Response Theory ◽  
Item Response ◽  
Self Efficacy ◽  
Response Theory ◽  
Theory Analysis ◽  
Community Based ◽  
Item Parameters ◽  
Item Response Theory Analysis ◽  
Graded Response ◽  
Active Living Every Day

Using item response theory (IRT), we examined the Rheumatoid Arthritis Self-efficacy scale (RASE) collected from a People with Arthritis Can Exercise RCT (346 participants) and 2 subscales of the Arthritis Self-efficacy scale (ASE) collected from an Active Living Every Day (ALED) RCT (354 participants) to determine which one better identifies low arthritis self-efficacy in community-based adults with arthritis. The item parameters were estimated in Multilog using the graded response model. The 2 ASE subscales are adequately explained by one factor. There was evidence for 2 locally dependent item pairs; two items from these pairs were removed when we reran the model. The exploratory factor analysis results for RASE showed a multifactor solution which led to a 9-factor solution. In order to perform IRT analysis, one item from each of the 9 subfactors was selected. Both scales were effective at measuring a range of arthritis SE.

Item-Response-Theory Analysis of Two Scales for Self-Efficacy for Exercise Behavior in People With Arthritis

2011 ◽  
Vol 19 (3) ◽  
pp. 239-248 ◽  
Author(s):  
Thelma J. Mielenz ◽  
Michael C. Edwards ◽  
Leigh F. Callahan
Keyword(s):  
Physical Activity ◽  
Older Adults ◽  
Item Response Theory ◽  
Item Response ◽  
Self Efficacy ◽  
Exercise Behavior ◽  
Response Theory ◽  
Item Response Theory Analysis ◽  
Graded Response ◽  
Item Scale

Benefits of physical activity for those with arthritis are clear, yet physical activity is difficult to initiate and maintain. Self-efficacy is a key modifiable psychosocial determinant of physical activity. This study examined two scales for self-efficacy for exercise behavior (SEEB) to identify their strengths and weaknesses using item response theory (IRT) from community-based randomized controlled trials of physical activity programs in adults with arthritis. The 2 SEEB scales included the 9-item scale by Resnick developed with older adults and the 5-item scale by Marcus developed with employed adults. All IRT analyses were conducted using the graded-response model. IRT assumptions were assessed using both exploratory and confirmatory factor analysis. The IRT analyses indicated that these scales are precise and reliable measures for identifying people with arthritis and low SEEB. The Resnick SEEB scale is slightly more precise at lower levels of self-efficacy in older adults with arthritis.

scholarly journals Item Response Theory Analysis of the Texas Functional Living Scale

2020 ◽  
Author(s):  
Deborah A Lowe ◽  
John F Linck
Keyword(s):  
Item Response Theory ◽  
Item Response ◽  
Functional Impairment ◽  
Item Difficulty ◽  
Clinical Sample ◽  
Functional Abilities ◽  
Response Theory ◽  
Item Parameters ◽  
Item Response Theory Analysis ◽  
Graded Response

Abstract Objective The Texas Functional Living Scale (TFLS) is a performance-based measure of functional abilities assessing the domains of time, money and calculation, communication, and memory. It is likely that certain items are more sensitive at different levels of functional impairment, with some signaling milder degrees of functional difficulty. This study analyzed psychometric characteristics of individual TFLS items using item response theory (IRT) in an outpatient clinical sample. Method In total, 270 adult outpatients completed the TFLS during clinical neuropsychological evaluation. IRT analysis using 2PL and graded response model was applied to the TFLS. Results Item parameters, item characteristic curves, and information curves were produced. Item difficulty (a) parameters ranged from 1.05 to 2.23, and item discrimination (b) parameters ranged from −4.11 to 0.51. Conclusions TFLS items were differentially sensitive along the continuum of functional impairment. Items that were most sensitive to milder degrees of functional impairment involved clock drawing, microwave programming, financial calculation, and prospective memory. Other items that were optimally precise in more severe degrees of functional impairment involved interacting with a calendar and a relatively simple financial calculation task. These findings suggest that the ability to pass at least some of the items on the TFLS may not necessarily reflect fully intact functional abilities. Certain TFLS items may be able to detect the presence of subtle functional difficulties.

Introduction to bifactor polytomous item response theory analysis

2017 ◽  
Vol 60 ◽  
pp. 41-63 ◽  
Author(s):  
Michael D. Toland ◽  
Isabella Sulis ◽  
Francesca Giambona ◽  
Mariano Porcu ◽  
Jonathan M. Campbell
Keyword(s):  
Item Response Theory ◽  
Item Response ◽  
Response Theory ◽  
Theory Analysis ◽  
Polytomous Item ◽  
Item Response Theory Analysis ◽  
Polytomous Item Response Theory ◽  
Polytomous Item Response

scholarly journals Investigating diagnostic bias in autism spectrum conditions: An item response theory analysis of sex bias in the AQ-10

2016 ◽  
Vol 10 (5) ◽  
pp. 790-800 ◽  
Author(s):  
Aja Louise Murray ◽  
Carrie Allison ◽  
Paula L. Smith ◽  
Simon Baron-Cohen ◽  
Tom Booth ◽  
...  
Keyword(s):  
Item Response Theory ◽  
Item Response ◽  
Autism Spectrum ◽  
Autism Spectrum Conditions ◽  
Sex Bias ◽  
Response Theory ◽  
Theory Analysis ◽  
Diagnostic Bias ◽  
Item Response Theory Analysis
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