AP Psych 1.2 Correlational & Experimental Research Methods

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The condition that exists when the probability that the findings are not due to chance

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statistical significance

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This research method is a measure of the extent to which two variables change together, and thus of how well either variable predicts the other.

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Correlational

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This is a method of research where an investigator manipulates one or more factors (independent variables) to observe the effect on some behavior or mental process (the dependent variable).

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Experiments

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Which method best limits the influence of unknown variables in an experiment? Options: Random assignment, Debriefing, Stratified Sampling, Correlational study

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Random assignment

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Dr. Lee is interested in the effect of lighting on people's ability to concentrate by manipulating the amount of lighting while participants read and measuring their scores on a reading comprehension test. What research method is Dr. Lee using?

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Experiment

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Which of the following measures can be precisely located on the graph of a skewed distribution without doing any calculations? Mode, Median, Mean, Standard deviation

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Mode

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It is important for researchers to use precise operational definitions when...

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They want to be able to replicate the experiment

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The way the words are presented in a memory recall study is which type of variable? Options: Confounding, Dependent, Independent, Extraneous

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Independent

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A teacher finds the distribution of scores on a final exam to be positively skewed with low variability. On the basis of this information, the teacher would be most justified in concluding that...

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The exam was too difficult

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Research finds that, in general, the higher an incoming college student scores on a given test, the higher the student's college GPA. Which of the following best describes this relationship?

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A positive correlation