09-12-2007, 05:07 PM
The hypothesis that ADHD has a genetic basis
a. has been proven false; the disorder is more likely caused by environmental stress.
b. has been demonstrated in twin studies.
c. has been found to be true only for those children whose parents are also antisocial.
d. has been found to be true only for those children who also have learning disabilities
a. has been proven false; the disorder is more likely caused by environmental stress.
b. has been demonstrated in twin studies.
c. has been found to be true only for those children whose parents are also antisocial.
d. has been found to be true only for those children who also have learning disabilities