Which indicator is used to measure the 'Knowledge' dimension of the Human Development Index?
General Awareness ·Previously asked in SSC CGL 2025
View the full solved paper: SSC CGL 2025 Tier II (19 Jan 2026)
Question
Which indicator is used to measure the 'Knowledge' dimension of the Human Development Index?
- A. Student-to-teacher ratio in secondary education
- B. Mean years of schooling and Expected years of schooling (Correct answer)
- C. Adult literacy rate and primary school enrollment
- D. Number of universities and research publications
Correct Answer
Option B — Mean years of schooling and Expected years of schooling
Detailed Solution & Explanation
The correct answer is Mean years of schooling and Expected years of schooling.
Key Points
- The HDI combines three dimensions, and the Knowledge dimension is measured by two education indicators together:
- Mean years of schooling for adults aged 25 and over
- Expected years of schooling for children entering school
- Adult literacy rate was used in the older methodology but was replaced in the 2010 revision, which is why option C is the historical trap.
Additional Information
- The other two dimensions: a long and healthy life, measured by life expectancy at birth, and a decent standard of living, measured by GNI per capita (PPP).
- The HDI is published by the UNDP in the annual Human Development Report, first issued in 1990 and devised by Mahbub ul Haq with Amartya Sen.
- Values run from 0 to 1, with countries grouped as low, medium, high and very high human development.
- Related indices in the same report: the Inequality-adjusted HDI, the Gender Inequality Index and the Multidimensional Poverty Index.
Topics covered: Economy Human Development Index