Disability Concepts: Impairment, Disability, Handicap, and Related Terms

Core Definitions (WHO ICF Framework)

The World Health Organization's International Classification of Functioning, Disability and Health (ICF) provides a standardized framework:

1. Impairment

A loss or abnormality of body structure or physiological/psychological function (e.g., paralysis, vision loss, intellectual disability).

2. Activity Limitation

Difficulty executing a task or action (e.g., inability to walk, dress, or communicate). Formerly termed "disability."

3. Participation Restriction

Problems with involvement in life situations (e.g., employment, education, social engagement). Formerly termed "handicap."

4. Environmental and Personal Factors

Contextual factors that facilitate or hinder functioning (e.g., accessibility, attitudes, assistive technology, coping skills).

Additional Health Concepts

• Chronic condition: Long-term health issue requiring ongoing management (e.g., diabetes, arthritis).
• Malignant disease: Cancer with invasive, destructive potential.
• Terminal illness: Incurable condition expected to lead to death in a relatively short time.
• Functional limitations: Difficulty performing essential daily activities (ADLs/IADLs).
• Quality of life: Subjective well-being across physical, mental, social, and environmental domains.

Why Terminology Matters

Precise language promotes person-centered care, reduces stigma, guides policy, and ensures accurate assessment of needs and outcomes.