Mathematical performance, for PISA, measures the mathematical literacy of a 15 year-old to formulate, employ and interpret mathematics in a variety of contexts to describe, predict and explain phenomena, recognising the role that mathematics plays in the world. The mean score is the measure. A...

Scientific performance, for PISA, measures the scientific literacy of a 15 year-old in the use of scientific knowledge to identify questions, acquire new knowledge, explain scientific phenomena, and draw evidence-based conclusions about science-related issues. The mean score is the measure.

Reading performance, for PISA, measures the capacity to understand, use and reflect on written texts in order to achieve goals, develop knowledge and potential, and participate in society. The mean score is the measure.