Final answer:
The mean age of onset of schizophrenia is later in women, not earlier. Menarche refers to a female's first menstrual period. A study showed adoptees with a high genetic risk for schizophrenia have a markedly higher likelihood of developing the disorder if raised in a disturbed family environment.
Step-by-step explanation:
The statement about the mean age of onset of schizophrenia in women being approximately five years earlier than in men is false. In fact, research indicates that schizophrenia tends to manifest earlier in men, typically in the late teens to early 20s, whereas in women, the onset is more commonly in the late 20s to early 30s.
This suggests that the mean age of onset is later in women rather than earlier. Menarche is the term used to describe a female's first menstrual period, marking the onset of reproductive capability. The empirical study presented, it highlights the interaction between genetics and environment in the development of schizophrenia: adoptees with a high genetic risk (biological mothers had schizophrenia) and who were raised in a disturbed family environment had a significantly higher likelihood (36.8%) of developing schizophrenia, in contrast to those with high genetic risk but raised in healthy environments (5.8%), and those with low genetic risk, regardless of family environment (5.3% in disturbed and 4.8% in healthy).