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A psychologist was interested in the effects of meaningfulness and amount of material on memory. Participants...

A psychologist was interested in the effects of meaningfulness and amount of material on memory. Participants took part in an experiment in which they learned lists of meaningful or meaningless words. The independent variables were (a) list length (short or long) and (b) type of material (meaningful or meaningless). The dependent variable was the percentage of words recalled after one week. These are the findings:

GRAPH:

Short List

Long List

Meaningful

60

5

32.5

Meaningless

35

5

20

47.5

5

Main effect for List Length:

Main effect for Type of Material:

Interaction:

Math   Statistics-And-Probability   
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