Characteristics
Domains assessed:
Conceptual Knowledge
Specific context:
Environmental
Validation sample population age:
Adults: 18 to 64 years
Modes of administration in validation study
:
Computer-based, Mailed survey, Paper and pencil
Time Cut-off:
0 minutes
Assessment:
Objective
Psychometrics
Number of items:
6
Sample size in validation study:
869
Language of validated version:
English
Main article reference
Irvin, V. L., Rohlman, D., Vaughan, A., Amantia, R., Berlin, C., & Kile, M. L. (2019). Development and Validation of an Environmental Health Literacy Assessment Screening Tool for Domestic Well Owners: The Water Environmental Literacy Level Scale (WELLS). International journal of environmental research and public health, 16(5), 881. doi:10.3390/ijerph16050881
Link to articleCorresponding author
Veronica Irvin
Description
A environmental health literacy screening tool for adults.
Year Measure first Published: 2019
About This Measure
Categorical scoring:
Yes
Scoring categories:
WELLS is a six-item scale and each correct response was awarded one point. Scores are assigned from zero to six, with one point for each correct answer. Higher scores relate to higher health literacy. -Low (score of 0–2) -Medium (score of 3 or 4) -High (score of 4 or 6)
About the Validation of this Measure
Country where validated:
United States of America
Content validity:
The WELLS scale was developed using guidelines from DeVellis. Content validity was assessed through scale adaptation from the NVS and from expert reviews.
Criterion validity:
The mean difference between the scores NVS and WELLS scales was 0.012 (SD = 1.16) and the 95% lower (−1.15) and upper (1.18) limits of agreement.The two health literacy scales reported a moderate, but significant correlation with each other (ρ = 0.47, p < 0.001).
Reliability (Cronbach Alpha):
0.51
