# PSY 315 Course Material - psy315dotcom

## PSY 315 Course Material - psy315dotcom

PSY 315 Week 5 Team Assignment Correlation Study Worksheet

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Describe the process that your research team would go through by completing the following:

1 Make a scatter diagram of the scores.
2 Describe in words the general pattern of correlation, if any.
3 Figure the correlation coefficient.
4 Figure whether the correlation is statistically significant (use the .05 significance level, two-tailed).
5 Explain the logic of what you have done, writing as if you are speaking to someone who has never heard of correlation (but who does understand the mean, standard deviation, Z scores, and hypothesis testing).

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PSY 315 Week 4 Practice Problems Worksheet

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24. Rosalie Friend (2001), and educational psychologist, compared three methods of teaching writing. Students were randomly assigned to three different experimental conditions involving different methods of writing a summary. At the end of the two days of instructions, participants wrote a summary. One of the ways it was scored was the percentage of specific details of information it included from the original material. Here is a selection from her article describing one of the findings:

The effect of summarization method on inclusion of important information was significant F(2, 144) = 4.1032, p < .019. The mean scores (with standard deviations in parantheses) were as follows: Argument Repetition, 59.6% (17.9); Generalization, 59.8% (15.2); and Self-Reflection, 50.2% (18.0). (p.14)

a. Explain these results to a person who has never had a course in statistics.
b. Using the information in the preceding description, figure the effect size for the study....