When Thorndike studied cats escaping from puzzle boxes, what result would have suggested to him that the cats gained an understanding of how to open the box?
a. If the cats' speed of escaping had increased more gradually than it did
b. If the cats' speed of escaping had increased suddenly at some point
c. If the cats had been able to learn without reinforcement
d. If the cats had shown a facial expression whenever they escaped
b
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During the embryonic stage of prenatal development, which term refers to the layer of cells that forms the muscles, bones, blood, and circulatory system?
A. mesoderm B. ectoderm C. endoderm D. placenta
Most theories developed by behavior geneticists to pin down genetic explanations for abnormal behavior assume that mental disorders are most likely
a. polygenic; that is, caused by a single gene. b. polygenic; that is, caused by multiple genes. c. autosomal; that is, caused by a single gene. d. autosomal; that is, caused by multiple genes.
Heritability generally runs about ____ percent or a tad more for each of the big five trait dimensions.
A) 25 B) 50 C) 75 D) 90
After childbirth, women may experience a mild depression lasting from one to two days after delivery, which is marked by crying, fitful sleep, tension, anger, and irritability. This mild depression is known as
a. postpartum depression. b. motherese. c. maternity blues. d. childbirth-related dysthymia.