Characteristics
Domains assessed:
Numeracy
Specific context:
Health Promotion
Validation sample population age:
Adults: 18 to 64 years
Modes of administration in validation study
:
Face-to-face, Paper and pencil
Assessment:
Objective
Psychometrics
Number of items:
20
Sample size in validation study:
1000
Language of validated version:
English
Main article reference
Schapira, M.M., Walker, C.M., Cappaert, K.J., Ganschow, P.S., Fletcher, K.E., McGinley, E.L., Del Pozo, S., Schauer, C., Tarima, S., & Jacobs, E.A. (2012). The numeracy understanding in medicine instrument: a measure of health numeracy developed using item response theory. Med Decis Making, 32(6):851-65.
Link to articleCorresponding author
Marilyn Schapira
Description
Examines ability to communicate, and participate in one's health and medical decisions
Year Measure first Published: 2012
About This Measure
Categorical scoring:
No
Scoring categories:
Sum score
Modern Approach for Tool Development:
Yes
About the Validation of this Measure
Country where validated:
United States of America
Content validity:
Expert panel included in development process (bilingual clinicians, expertise in patient-physician communication, health print and numeracy, adult education, cross-cultural survey research). Items were cognitively tested.
Criterion validity:
Performance on the NUMi was strongly correlated with the Wide Range Achievement Test–Arithmetic (0.73, P<0.001), the Lipkus Expanded Numeracy Scale (0.69, P< 0.001), the Medical Data Interpretation Test (0.75, P< 0.001), and the Wonderlic Cognitive Ability Test (0.82, P<0.001). Performance was moderately correlated to the Short Test of Functional Health Literacy (0.43, P <0.001).
Reliability (Cronbach Alpha):
0.86
