Elizabeth A. Hahn|Seung W. Choi|James W. Griffith|Kathleen J. Yost|David W. Baker
Health Literacy Assessment Using Talking Touchscreen Technology (Health LiTT): A New Item Response Theory-Based Measure of Health Literacy
Northwestern University|Northwestern University|Northwestern University|Mayo Clinic in Florida|Northwestern University
importance health literacy grown considerably among researchers clinicians patients policymakers better instruments measurement strategies needed objective develop new health literacy instrument using novel health information technology modern psychometrics designed health litt selfadministered multimedia touchscreen test based item response theory irt principles enrolled diverse group 619 englishspeaking primary care patients clinics underserved patients tested three item types prose document quantitative worked well together reliably measure single dimension health literacy health litt score meets psychometric standards reliability 090 higher measurement individual respondents low middle range mean health litt scores associated age raceethnicity education income prior computer use p 05 created irtcalibrated item bank 82 items standard setting needs performed classify map items onto construct identify measurement gaps incorporating health litt existing online research management tool enable administration health litt touchscreen used patientreported outcomes well realtime scoring reporting health literacy scores