Endpoint

Child IQ (across unharmonised instruments)

CAT:outcome/child-iq-across-unharmonised-instrumentsreported in standardised mean difference

How it is measured

Child intelligence quotient or general cognitive index score on whichever standardised intelligence instruments the source studies used (Wechsler scales, McCarthy Scales of Children's Abilities and similar), expressed on a common standardised scale across unharmonised instruments, with no single instrument held constant. Constituent instruments are listed with each finding where named.