The similarity between intelligence scores of dyzygotic twins raised together is:

Studies of twins, family members, and adobted children also provide evidence of environmental influence on intelligence. The intelligence scores of fraternal twins raised together are more similar than those of other siblings, and scores of identical twins raised apart are less similar (though still very highly correlated) than the scores of identical kids raised together. Other studies of children reared in extremely impoverished, enriched, or culturally different environments indicate that life experiences significantly influence intelligence peformance