Medium
Multiple Linear Regression
SPSS
Free
A researcher uses hierarchical regression to predict job performance from: Step 1: years of experience; Step 2: conscientiousness score. SPSS Model Summary shows: Model 1 R² = .12; Model 2 R² = .20; and the 'R Square Change' test for Step 2 has Sig. = .01. Which statement is correct?
A
Conscientiousness adds 8% additional explained variance in job performance beyond experience, and this increase is statistically significant.
B
Experience is no longer a significant predictor once conscientiousness is added, because R² increased.
C
Conscientiousness explains 20% of job performance by itself because Model 2 R² = .20.
D
Because Step 2 is significant, conscientiousness is definitely the strongest predictor in the model.