Statistical Methods for Psychology

coefficients you see that both the centered Hassles and the interaction terms are signifi-

cant (p 5 .000 and .037, respectively), but the social support variable is not significant.

By convention we leave it in our regression solution, because it is involved in the inter-

action, even though the associated tvalue shows that deleting that variable would not

lead to a significant decrease in R^2.

Our regression equation now becomes

YN 5 .086 chassles 1 .146 csupport – .005 chassupp 1 89.585.

15.14 Mediating and Moderating Relationships 559

Hassles

1.000

–.167

.577**

.910**

1.000**

–.167

–.297*

Hassles

Support

Symptoms

hassupp

chassles

csupport

chassupp

Support

–.167

1.000

–.134

–.510**

–.167

1.000**

.402**

Symptoms

.577**

–.134

1.000

.585**

.577**

–.134

–.391**

hassupp

.910**

–.510**

.585**

1.000

.910**

–.510**

–.576**

chassles

1.000**

–.167

.577**

.910**

1.000

–.167

–.297*

csupport

–.167

1.000**

–.134

–.510**

–.167

1.000

.402**

chassupp

–.297*

.402**

–.391**

–.576**

–.297*

.402**

1.000

Correlations

Pearson Correlation

** Correlation is significant at the .01 level (2-tailed).

* Correlation is significant at the .05 level (2-tailed).

Sum of

Squares

9427.898

14839.816

24267.714

Model

1 Regression

Residual

Total

df

3

52

55

Mean

Square

3142.633

285.381

F

11.012

Sig.

.000a

ANOVAb

Coefficientsa

Model

1 (Constant)

chassles

csupport

chassupp

B

89.585

8.594E-02

.146

–5.06E-03

Std. Error

2.292

.019

.305

.002

Beta

.509

.057

–.262

t

30.094

4.473

.479

–2.144

Sig.

.000

.000

.634

.037

Unstandardized

Coefficients

Standardized

Coefficients

aPredictors: (Constant), chassupp, chassles, csupport

bDependent Variable: Symptoms

aDependent Variable: Symptoms

Table 15.5 Regression solution for moderated relationship between hassles

and symptoms

R

.623a

Model

1

R Square

.388

Adjusted

R Square

.353

Std. Error

of the

Estimate

16.8932

Model Summary

aPredictors: (Constant), CHASSUPP, CHASSLES, CSUPPORT