Sickle-cell anemia is an evolutionary defense against what disease?

Which statement about errorless discrimination training is true?

a) It can be used to transfer control from one type of stimulus to another b) It is more effective than fading for minimizing errors c) It is theoretically interesting but has no practical applications d) It increases adverse side effects of extinction such as emotional behavior

Who of the following individuals has two positive risk factors for suicide?

A) a devout woman B) a married man C) a divorced woman D) a man who is an atheist