Adjusted R²

R² Change

F Change

β

t

Gambling-related Cognitions

Step 1

0.020

0.028

30.474

Intervention

0.168

10.864

Step 2

0.077

0.064

80.343**

Gambling Severity

−0.253

-20.888**

Step 3

0.114

0.044

50.935*

Intervention*Gambling Severity

0.642

20.436*