The middle of an ordered set of values
a. mode
b. mean
c. confidence interval
d. median
D
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The null hypothesis that is appropriate to state with a directional research hypothesis asserts that
a. the independent variable has no effect. b. chance alone is responsible for the observed differences between conditions. c. the independent variable does not have an effect in the direction predicted by the research hypothesis (H1). d. b and c.
After an experiment was in progress, a researcher learned that the experimental group had a more experienced teacher than did the control group. Should the researcher mention this fact in the research report?
a. Yes, any factor which might affect the internal validity of the experiment should be reported. b. No, it is not necessary for the reader to know all the details about problems which arise during the course of a study
According to the text, what is a disadvantage of traditional cooperative learning groups?
a. All students in the group are required to do all aspects of the assigned activity. b. Only one student of the group is assigned to do the required activity; the other students watch and provide input. c. All students are required to verbalize their thinking, so the final conclusions represent the thinking of all members of the group. d. All students are required to interact with the teacher so the thoughts of each individual can be challenged by the teacher. e. All of the above f. None of the above
In a study by Glynn et al. students wrote an unpolished first draft and a polished second draft (unpolished group) or polished first and second drafts (polished group). Which of the following is correct concerning the quality of the second draft?
a. the polished group produced essays with more mechanical errors than did the unpolished group b. the polished group produced essays with more arguments than did the unpolished group c. both of the above d. none of the above