A review of the concordance rates for homosexuality among twin brothers indicates the rate of homosexuality in fraternal twins was 22. How have researchers interpreted this finding?
a) The rate points to the influence of genetic factors.
b) The finding confirms previous results indicating homosexuality does
not have a genetic basis.
c) This rate is above the rate for non-twin brothers and thus points to environmental influences.
d) The finding indicates the key factor in homosexuality is having a same-sex sibling in the household.
Question 2
Which of the following is NOT a DSM-5 criterion for sexual interest/arousal disorder in women?
a) diminished interest in sexual activity
b) increase in sexual fantasies without arousal
c) absence of sexual arousal
d) absence of genital sensations during most sexual encounters