PMID- 17077167
OWN - NLM
STAT- MEDLINE
DCOM- 20070514
LR  - 20211203
IS  - 0268-1153 (Print)
IS  - 0268-1153 (Linking)
VI  - 21 Suppl 1
DP  - 2006 Dec
TI  - Item response modeling: an evaluation of the children's fruit and vegetable 
      self-efficacy questionnaire.
PG  - i47-57
AB  - Perceived self-efficacy (SE) for eating fruit and vegetables (FV) is a key 
      variable mediating FV change in interventions. This study applies item response 
      modeling (IRM) to a fruit, juice and vegetable self-efficacy questionnaire 
      (FVSEQ) previously validated with classical test theory (CTT) procedures. The 
      24-item (five-point Likert scale) FVSEQ was administered to 1578 fourth graders 
      from 26 Houston schools. The IRM partial credit model indicated the five-point 
      response options were not fully utilized. The questionnaire exhibited acceptable 
      (>0.70) reliability except at the extremes of the SE scale. Differential item 
      functioning (DIF) analyses revealed no response bias due to gender. However, DIF 
      was detected by ethnic groups in 10 items. IRM of this scale expanded what was 
      known from CTT methods in three ways: (i) areas of the scale were identified that 
      were not as reliable, (ii) limitations were found in the response format and (c) 
      areas of the SE scale levels were not measured. The FVSEQ can be improved by 
      including items at the extreme levels of difficulty. DIF analyses identified 
      areas where IRM can be useful to improve the functioning of measures.
FAU - Watson, Kathy
AU  - Watson K
AD  - USDA/ARS, Children's Nutrition Research Center, Department of Pediatrics, Baylor 
      College of Medicine, 1100 Bates Street, Houston, TX 77030, USA. 
      kwatson@bcm.tmc.edu
FAU - Baranowski, Tom
AU  - Baranowski T
FAU - Thompson, Debbe
AU  - Thompson D
LA  - eng
GR  - R01 CA-75614/CA/NCI NIH HHS/United States
PT  - Journal Article
PT  - Research Support, N.I.H., Extramural
PT  - Research Support, U.S. Gov't, Non-P.H.S.
DEP - 20061031
PL  - England
TA  - Health Educ Res
JT  - Health education research
JID - 8608459
MH  - Child
MH  - Cross-Sectional Studies
MH  - Ethnicity
MH  - Evaluation Studies as Topic
MH  - Factor Analysis, Statistical
MH  - Female
MH  - *Fruit
MH  - Humans
MH  - Male
MH  - Models, Educational
MH  - Reproducibility of Results
MH  - *Self Efficacy
MH  - Sensitivity and Specificity
MH  - Sex Factors
MH  - Surveys and Questionnaires/*standards
MH  - *Vegetables
EDAT- 2006/11/02 09:00
MHDA- 2007/05/15 09:00
CRDT- 2006/11/02 09:00
PHST- 2006/11/02 09:00 [pubmed]
PHST- 2007/05/15 09:00 [medline]
PHST- 2006/11/02 09:00 [entrez]
AID - cyl136 [pii]
AID - 10.1093/her/cyl136 [doi]
PST - ppublish
SO  - Health Educ Res. 2006 Dec;21 Suppl 1:i47-57. doi: 10.1093/her/cyl136. Epub 2006 
      Oct 31.