When Mrs. McGuire asks her students to answer questions in class, she can quickly tell from their facial expressions whether they are happy to participate. Mrs. McGuire's perceptual skill best illustrates

Izzy's pupils are dilated and her heart is pounding; her breathing is shallow and rapid. Her _________ nervous system is active

a) parasympathetic b) sympathetic c) autosympathetic d) somatic

Which of the following is a major limitation of naturalistic observation?

A) For each participant, responses may differ due to the manner of interviewing. B) Researchers cannot expect that participants will behave in the laboratory as they do in their natural environments. C) Findings cannot be generalized beyond the participants and settings in which the research was originally conducted. D) Not all participants have the same opportunity to display a particular behavior in everyday life.