
Health Literacy Standards
IHA’s 25+ years of experience leading the health literacy field led to the development of the Plain Language Assessment Tool for Organizations (PLATO) and Numeric-Plain Language Assessment Tool (N-PLAT).
These tools are based on IHA’s patented method for improving health literacy of patient materials (U.S. Patent No. WO US US11380444B2 Granted 2022-07-05).
PLATO/N-PLAT
IHA’s “Plain Language Assessment Tool for Organizations” (PLATO™) is a patented method of improving health literacy of health materials.
IHA’s Numeric Plain Language Assessment Tool (N-PLAT™) is the numeracy and plain language standards derived from PLATO.
This standard ensures information is accessible to people with:
- Marginal literacy skills
- Limited health/healthcare knowledge
- Limited time to read and understand content
N-PLAT Standards / Scoring
Design: Evaluates overall appearance, legibility, and graphic clarity. (27 possible points):
Text: Assesses reading level, word simplicity, message clarity, and tone (39 possible points)
Categorized into three quality levels:
- Superior (85%-100%): Most likely to be read, understood and used by most participants
- Adequate (75%-84%): Probably can be read, understood and used by most participants
- Inadequate (74% and below): Least likely to be read, understood and used by most participants

PEMAT
US Department of Health and Human Services Agency for Healthcare Research & Quality’s (AHRQ) Patient Education Materials Assessment Tool (PEMAT) is an instrument to assess the understandability and actionability of print and audiovisual patient education materials.
The PEMAT framework:
- Understandability: Patient education materials are understandable when consumers of diverse backgrounds and varying levels of health literacy can process and explain key messages.
- Actionability: Patient education materials are actionable when consumers of diverse backgrounds and varying levels of health literacy can identify what they can do based on the information presented.
PEMAT Standards / Scoring
Overall: Understandability score + Actionabiity score (20 possible points)
Understandability: Assesses how well the material enables users to identify and take specific actions to manage their health through clear instructions and practical tools. (15 possible points)
Sub-topics include: Content Purpose & Clarity, Language Accessibility, Numerical Clarity, Information Structure, Visual Design, and Visual Aid Integration. (1-3 possible points each)
Actionability: Evaluates whether the material provides clear, explicit steps and tools that help users take specific health-related actions. (5 possible points)
Sub-topics include: Action-Oriented Content, Practical Tools, and Implementation Support. (1 possible point each)

PLATO and NPLAT are trademarks of Institute for Healthcare Advancement.
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