603 Review Part 1

Reg-1

100

Ŷ = a + b₁X₁ + b₂X₂ + b₃X₃ is called a?

Regression equation

100

In MR, this value represents the unique relationship between Y and an X

Partial regression coeff.(or partial r2)

100

In MR, this is proportion of variability in Y explained by Xs as-a-set

R²

100

Which will tend to be smaller? Zero-order reg. wts or partial reg. wts?

Partial

100

In MR: Which represents variability acctd for by Xs? SSReg, SSResidual, SSTotal?

SSReg

Reg-2

100

Name for situation where Xs are highly correlated (+.70)

Multicollinearity

100

Variability in Y the same across levels of X

Homoskedasticity

100

What do we call a variable that comes between X and Y in a causal chain?

mediator

100

Another term for a mediated effect is?

An indirect effect

100

What do we call a variable that qualifies the conditions under which an effect holds?

Moderator

Reg-3

100

When testing for moderation in MR, if a sig. interaction is found, next steps?

Simple slopes

100

In MR, the interaction term has to be created by researcher. How is this done?

Multiplying the two predictors/Xs (X1*X2)

100

If [X1*X2] ns, next step?

Re-run MR without interaction term

100

Effect of stressors on health depends on social support. Social support is a

Moderator variable

100

One benefit of “centering” Xs in MR is that it reduces

Multicollinearity

Reg/ANOVA-4

100

Higher stress --> Poorer sleep quality. Poorer sleep quality then leads to depression. Sleep quality is what type of variable?

mediator

100

Family counseling improves behavior of adolescents, but only for families with mod-high SES, not low SES. SES is what kind of variable?

Moderator

100

Researchers study effect of exposure therapy on severity of panic attacks; Baseline panic severity 1st measured, then therapy, then measured again. Test?

Repeated Ms/Within Ss

100

In (2 x 2) Factorial ANOVA: Two sig. main effects are found, as well as interaction. Which do we interpret?

Interaction

100

To interpret an interaction in ANOVA, should the researcher examine marginal or cell means?

Cell means

AnCova-5

100

If a there is a significant main effect of a 3-group IV in ANCOVA, it means that the groups differ on...?

Adjusted means

100

In ANCOVA, what are "adjusted means"?

Means that have been adjusted for a covariate

100

ANCOVA: How are “adjusted” means computed?

Predicted Ys from MR w/ X & Cov as predictors