What is the concordance rate of homosexuality in fraternal twins?

In lecture, all of the following were characteristics were described as being associated with autism EXCEPT:

a. delays in language development b. difficulty engaging in focused attention c. avoidance of eye contact d. restricted interests and insistence of routines

Research on college sororities has found that ____

a. binge eating leads to social exclusion b. binge eating levels depend mostly on geographic region c. binge eating patterns seem to be contagious d. binge eating occurs among the most isolated sorority members