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Quiz 13 :
Experimental Research: Quasi and Single-Case Designs

Quiz 13 :
Experimental Research: Quasi and Single-Case Designs

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Explain the difference between strong experimental research designs and quasi-experimental research designs.
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Explain the limitations of quasi-experimental designs in making causal inferences compared to strong designs.
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Explain the characteristics of the nonequivalent comparison-group quasi-experimental design and how to search for rival hypotheses that might explain the obtained results.
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Explain the characteristics of the interrupted time-series designs.
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Explain how the regression discontinuity design assesses the effect of a treatment.
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Explain how time-series and single-case research designs attempt to rule out confounding variables.
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Explain how a treatment effect is demonstrated in single-case research designs.
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Explain the limitations of each of the single-case research designs.
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Recognize and understand the methodological issues in single-case research designs. Multiple Choice Questions
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A key characteristic that differentiates quasi-experiments from strong experiments is:
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A statistical technique used to equate nonequivalent groups on their pretest scores in a nonequivalent comparison-groups design is:
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A selection-maturation effect occurs when:
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A researcher does a study examining the effects of a preschool program. He uses a nonequivalent comparison-group design. He finds that the cognitive growth of his experimental group is greater than that of his control. Unfortunately, he later finds that in general children who live in the area where he drew his experimental group tend to grow faster cognitively than children who were from the area where he drew his control group. When he discovered this problem, he discovered what threat to the internal validity of his study?
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The design where the pattern of pretest responses is compared with the pattern of posttest responses is called:
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A researcher is interested in improving student attention in a classroom. She measures student attention during five preintervention sessions. Her measure is the number of students attending in the class (out of 25 students). She then introduces the program to increase the number of children paying attention. She then measures six more times the number of children attending. Which series would best show that the intervention had an effect? img
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Which series shows a potential maturation effect? img
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Which series seems indicative of no effect? img
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In a quasi-experimental study, when an event occurs during the study that affects the dependent variable scores of one group but not the other, this is called:
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A researcher is carrying out a quasi-experimental study. She has experimental groups in one school, and a control group in another. During the intervention phase of her study, the control school has a small fire that forces students to leave the school for one hour. She finds huge differences between the experimental and control groups after the study is completed. While there could be an effect of her intervention, a possible rival hypothesis might be:
Multiple Choice
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In an A-B-A single-case design, participants get which of the following sequences of treatment and baseline:
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