José Luis Pontijas Calderón|Leo S. Morales|Honghu Liu|Ron D. Hays
Variation in the Readability of Items Within Surveys
Charles R. Drew University of Medicine and Science|University of California, Los Angeles|University of California, Los Angeles|University of California, Los Angeles
objective studywas estimate variation readability survey items within 2 widely used healthrelated qualityoflife surveys national eye institute visual functioning questionnaire25 vfq25 short formhealth survey version 2 sf36v2 fleschkincaid flesch reading ease formulas used estimate readability individual survey item scores descriptive statistics survey calculated variation individual item scores mean survey score graphically depicted survey mean reading grade level reading ease estimates vfq25 sf36v2 78 fairly easy 64 easy respectively surveys notable variation item readability individual itemreadability scores ranged 37 120 easy difficult vfq25 22 120 easy difficult sf36v2 survey respondents may comprehend items readability scores exceed reading ability estimating readability survey item important component evaluating survey readability standards measuring readability surveys needed