Monday, March 8, 2010

SPSS



SPSS definitions:

p-value = Significance (SPSS)

pearson r = Pearson Correlation (bivariate SPSS)

Results section

"A significant correlation was observed between stress3 and coursgrad, r=-0.83, p=0.000."

Discussion section

"I interpret the correlation...." Correlation is for prediction, not causal. Avoid the impression that readers may have that you view it as causal.

r squared is the percentage of variance in y that is systematically varying with x. R-squared is the name of the game. The higher the better with the least number of independent variables.

y-intercept is the number in the constant row under Unstandardized Coeffificent B column (y = slope * x + y-intercept) (y=bx + a) See image above.

slope is the number under the constant row in the same area. (b**)

**If you standardize b, you get r.

The Ed Psych Data Directions in Blackboard is what we need to know.

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