Recent estimates of prevalence in the United States for ADHD are greater than ______ for males and almost 2% for females

Researchers have found that if one identical (monozygotic) twin suffers from schizophrenia, the other twin has a 50% chance of developing that condition. In fraternal (dizygotic) twins, however,

if one twin has the condition than the other a 27% chance of developing the disorder. These results provide evidence that there may be a strong __________ component to schizophrenia. a. environmental b. heritability c. diathesis d. chemical

In many cultures left-handedness is ____

a. only appropriate for males b. acceptable for childhood but not adulthood c. regarded with acceptance and equality d. regarded with fear and contempt