A statistical procedure for identifying common factors underlying performance on a group

Which of the following statements about surveys is most accurate?

A) Although surveys of the general population are useful, it can be valuable to target a particular, smaller population to better understand that group. B) Surveys that apply to broader populations are superior to surveys targeting groups. C) Large-scale surveys are better suited for testing questions about smaller groups in America. D) No survey method is better than any others; decisions of the size and scope of a survey typically reflect the biases of the researcher or the availability of funding.

Ellen's husband was killed in an automobile accident two weeks ago. Since that time she has

had repeated episodes of fleeting hallucinations and delusions. Her behavior has been marked by periods of incoherent speech, screaming, suicidal and aggressive behavior, and disorientation. After about a month, her behavior slowly returns to normal. She would be best diagnosed as suffering from ______. a. schizophreniform disorder c. schizotypal disorder b. schizoid disorder d. brief psychotic disorder