1 .		In experimental research, the experimenter controls [Hint]
2 .		A study is said to have strong internal validity if [Hint]
3 .		Non-random assignment to treatments is what type of threat to internal validity? [Hint]
4 .		Natural changes in subjects during the course of the experiment is what type of threat to internal validity? [Hint]
5 .		In an experiment comparing the story writing abilities of two groups of fourth graders, two sets of scorers (one set for each group) were selected to evaluate the stories. What threat to internal validity has occurred? [Hint]
6 .		External validity refers to the extent to which the results of the study [Hint]
7 .		Mr. Poche has serious concerns about a study that concluded co-operative group instruction was effective for all secondary students even though there were very few female students in either the experimental or control groups. Which of the following terms describes Mr. Poche’s concern? [Hint]
8 .		A teacher wanted to evaluate the efficacy of a new technique for teaching comprehension skills to her class of learning disabled students. She administered a comprehension test before introducing the new technique. At the end of the semester, she administered the test again and compared the results from the two tests. This is an example of a [Hint]
9 .		Under which conditions is a non-equivalent group post-test only design useful? [Hint]
10 .		According to the author, the most serious threat to the internal validity of the nonequivalent groups post-test-only design is [Hint]
11 .		To assess the efficacy of the new math curriculum, Ms. Jackson conducted a small experiment using two of her four sixth-grade math classes. She gave both classes a pretest, then taught Class A using the new curriculum and continued using the old curriculum with Class B. At the end of three months she administered a post-test to both classes. Which design did Ms. Jackson use in her experiment? [Hint]
12 .		Which of the following is NOT a threat to internal validity in the randomized groups post-test-only and the randomized groups pretest-post-test designs? [Hint]
13 .		Dr. Boudreaux wants to determine which of two textbooks will be most helpful to his students in an introductory research class. If he wants to formally study this question with his classes next semester and he wants to minimize selection threats he should use a [Hint]
14 .		A researcher wants to compare two methods of teaching reading to adults: the phonics approach and the language experience approach. He wants to know (a) which is the most effective method, and (b) whether the efficacy of the two methods is the same for adults with no reading skills as for adults reading at a fourth-grade level. Which is the most appropriate design for this experiment? [Hint]
15 .		Dr. Allen has used a factorial design to investigate the effects of his use of Power Point presentations to supplement his lectures on males and females in terms of their mastery of course objectives. Which of the following effects can be discussed? [Hint]
16 .		All of the following are criteria for evaluating experimental research EXCEPT [Hint]
17 .		Ms. Woods was concerned about the low number of math problems completed by one of the students in her class. To get the student to do more problems, she decided to give him two minutes of free time for every problem completed. Ms. Woods observed the student’s behavior for three days before introducing the free-time incentive. After ten days she withdrew this incentive, and for the next few days observed how many problems the student completed to see if free time had been effective in increasing the student’s work behavior. Which design did Ms. Woods use? [Hint]
18 .		All of the following are criteria for evaluating single-subject research EXCEPT [Hint]
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