Knowledgebase : Primary (PIPS,INCAS,BASE) > Feedback
PIPS uses standardised scores with a mean of 50 and a standard deviation of 10. To convert them to a mean of 100 and a standard deviation of 15: Multiply by 1.5 (this will adjust for the standard deviation) Add 25 (this maps to the required mean) ...
We use a (weighted) average of maths and reading as a predictor because this predictor correlates better with future attainment in maths (and predicts more accurately) than maths alone does, and it correlates better with future attainment in reading than ...