Oliver wants to children who live in extremely impoverished areas around the world, but he does not know if he wants to go into field work or research. which strategy would be best to learn whether he would enjoy the daily responsibilities of field work?

Shadowing a professional is the correct answer.

It's pretty common to be interested in a particular job, but still not being able to know if that's the job that you should pursue. For this reason, there are many strategies available that help people decide what is the best fit for them, such as: reading a professional association website, subscribing to receive e-newsletters rearding current industry issues, gathering information about a specific career path in the field and shadowing a professional. Among all the strategies, shadowing a professional is the best way to learn whether or not you will enjoy the daily responsibilities of the job.

as university of miami psychologists debra lieberman and adam smith pointed out in a recent article in the journal current directions in psychological science, humans have social and psychological mechanisms to deter incest. with very few exceptions, marriages between brothers and sisters and between parents and their children are verboten in every human culture. the primary psychological anti-incest mechanism is the yuck response. even the idea of sex with their mom or dad, bro or sis is upsetting to most people. the psychologist jonathan haidt has found that nearly everyone is repelled by the prospect of brother-sister sex, even in hypothetical situations in which there is no chance of pregnancy).

the biological cost of incest

this raises an interesting question: just what’s so bad about incest? sure, having sex with your dad or your sister seems gross — but why? some anthropologists have argued that incest taboos are learned social conventions. this explanation, however, doesn’t make sense to me as it does not explain the widespread existence of anti-incest mechanisms in creatures ranging from cockroaches to chimpanzees. second, the incest taboo is about as close to a universal law as human moral rules get.

why should mechanisms to avoid incest be so widespread both in nature and across human societies? the answer is simple. the problem with having sex close with relatives is that there is an astonishingly high chance that your offspring will be born with a serious birth defect.