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. Author manuscript; available in PMC: 2012 Nov 1.
Published in final edited form as: J Child Psychol Psychiatry. 2011 May 31;52(11):1155–1163. doi: 10.1111/j.1469-7610.2011.02420.x

Table 2.

Phenotypic Correlations: IC and Behavior Problems.

Parent IC Externalizing problems ADHD-DSM problems
Observed IC .21 −.13 −.20
Parent IC - −.54 −.57
Externalizing problems - - .82

Note. All correlations are significant at the p < .01 level.