The researchers also conducted post hoc simple effects tests to determine which means differed.

Results suggested that there was a "statistically significant increase in the percentage of time participants reported feeling happy for both the cognitive imagery condition, t(21) = 5.72, p < 0.0001, Cohen's d = 1.25, and the memorabilia condition, t(20) = 3.22, p < 0.003, d = 0.70, but not for the control condition, t(21) = 0.10, p < 0.92, d = 0.02" (Bryant et al., 2005, p. 245).

Question 25 of 392 Points

Based on these results, which type of reminiscing is most effective at changing happiness?

• A.

Memorabilia

• B.

Control

• C.

Cognitive imagery

Reset Selection

Question 26 of 393 Points

For the previous question: What evidence do you have?

• A.

The Cohen'sdeffect size was 1.25 for imagery, 0.70 for memorabilia, and 0.02 for the control condition

• B.

There is not enough information to make an informed decision

• C.

The pvalue was .00001for imagery, .003 for memorabilia, and .92for the control condition

• D.

The degrees of freedomwere21for imagery, 20for memorabilia, and 21for the control condition

Reset Selection

Question 27 of 392 Points

What additional statistic(s) might you want to see with this analysis?

• A.

Eta or omega-square to determine the proportion of variance in happiness explained by the interaction

• B.

A confidence interval around each mean difference

• C.

A multiple regression model predicting happiness from condition

• D.

The correlation between condition and happiness

Reset Selection