One inherent problem of ex post facto studies is that
a. the researcher needs to arrange occurrences of the situation beingstudied
b. the researcher must live with the subjects under study for a long periodof time.
c. information being sought may be incomplete.
d. all of the above.
C
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Which of the following is NOT an example of a practice used in the guidance classroom?
A) involvement of parents B) teacher as professional C) liberation teaching D) corporal punishment
Sleep apnea is related to which of the following?
A) Iron deficiency. B) Obesity. C) Rickets. D) Undernutrition.
Wendy is investigating differences in cardiovascular health between children who are involved in extra-curricular activities and those who are not. She decides to investigate only children who are average height and weight, with no existing heart conditions and no family history of obesity. Wendy has employed which method for controlling the extraneous variable in her study?
a. Matching b. Comparing homogeneous subgroups c. Analysis of covariance (ANCOVA) d. Manipulation of independent variable
Mr. Jerry is lecturing on the importance of lab equipment safety. As he gives his lecture, he notices two girls passing a note between them. He stops his lecture abruptly, and calls the whole class's attention to the matter. And even after the girls are shamefully embarrassed, he goes into a diatribe about the value of education, and how most students squander away their high school years. As a result, he spends a half hour scolding and moralizing his students rather than completing his lecture. Mr. Jerry is notorious for this behavior. In this case, Mr. Jerry fails to:
A. show that he is in charge. B. minimize transition time. C. hold students accountable. D. maintain activity flow.