Aside from handheld computers, what other technology may be used to gather data from individuals in their natural environments?

Which of the following terms best describes a change in amount?

A) Qualitative change B) Quantitative change C) Significant change D) Metric change

Correlations between aggressive behavior and testosterone levels do not necessarily mean that high testosterone levels cause aggressive behavior because

A) social aggression occurs only in males. B) the effects of estradial cannot be ruled out. C) aggressive encounters often cause increases in testosterone levels. D) humans and rats differ in their sex hormones. E) aggressive behavior is controlled by the amygdala.