A cognitive psychologist is investigating whether a new mnemonic technique improves memory recall. She measures the number of words recalled from a list of 30 by a group of 20 participants before learning the mnemonic, and then again after learning it.
Which of the following outlines the three essential criteria she must evaluate to choose the correct statistical test to analyze her results?
Whether she is looking for a difference or correlation, the experimental design (related or unrelated), and the level of measurement of the data.
Whether her hypothesis is one-tailed or two-tailed, the sample size (n=20n = 20n=20), and the type of sampling method used to recruit the participants.
The level of measurement of the data, the standard deviation of the recall scores, and whether the research is a lab or field experiment.
Whether she is looking for a difference or correlation, the number of independent variables, and the statistical significance level (α=0.05\alpha = 0.05α=0.05).
644 exam-style questions on OCR A Level Psychology Research methods and techniques. Each one has a worked solution and a mark scheme showing where the marks go.