for all their children. We must now seriously reexamine these assumptions. We now know that the correlations between siblings with respect to many of their character-istics are very low-indeed, sometimes lower than their genetic relatedness would predict. the unlikeness of siblings due to their being treated differently by their parents? To some extent, yes, though findings are not consistent across studies. What the behavior geneticists have shown that the genetic predispositions of different children often drive the responses of parents, detennining to some degree the kind of parenting a child will receive. Understandably then, behavior geneticists have assigned correlations between parent and child behaviors to the child's genetics, but I argue that this a mistake, in that it ignores the return feed-back loop whereby a parent, whose behavior has been triggered by the child, responds with actions which in their turn influence the child. ignore this reciprocal influence is to seriously underestimate parenting effects. The unlikeness of siblings continues to be something we do not fully understand. It has been interpreted to mean that aspects of environment which siblings share-

DOI link for for all their children. We must now seriously reexamine these assumptions. We now know that the correlations between siblings with respect to many of their character-istics are very low-indeed, sometimes lower than their genetic relatedness would predict. the unlikeness of siblings due to their being treated differently by their parents? To some extent, yes, though findings are not consistent across studies. What the behavior geneticists have shown that the genetic predispositions of different children often drive the responses of parents, detennining to some degree the kind of parenting a child will receive. Understandably then, behavior geneticists have assigned correlations between parent and child behaviors to the child's genetics, but I argue that this a mistake, in that it ignores the return feed-back loop whereby a parent, whose behavior has been triggered by the child, responds with actions which in their turn influence the child. ignore this reciprocal influence is to seriously underestimate parenting effects. The unlikeness of siblings continues to be something we do not fully understand. It has been interpreted to mean that aspects of environment which siblings share-

for all their children. We must now seriously reexamine these assumptions. We now know that the correlations between siblings with respect to many of their character-istics are very low-indeed, sometimes lower than their genetic relatedness would predict. the unlikeness of siblings due to their being treated differently by their parents? To some extent, yes, though findings are not consistent across studies. What the behavior geneticists have shown that the genetic predispositions of different children often drive the responses of parents, detennining to some degree the kind of parenting a child will receive. Understandably then, behavior geneticists have assigned correlations between parent and child behaviors to the child's genetics, but I argue that this a mistake, in that it ignores the return feed-back loop whereby a parent, whose behavior has been triggered by the child, responds with actions which in their turn influence the child. ignore this reciprocal influence is to seriously underestimate parenting effects. The unlikeness of siblings continues to be something we do not fully understand. It has been interpreted to mean that aspects of environment which siblings share-