B

SE b

R²

F change

β₁

β₂

β₃

β₄

Intentions

1. Attitudes

0.58

0.03

0.62^**

237.15^**

0.79^**

0.80^**

0.69^**

0.58^**

2. Subjective norms

−0.01

0.05

0.62

0.09

−0.01

−0.05

−0.03

3. Perceived behavioral control

0.25

0.06

0.65^**

15.79^**

0.23^**

0.19^*

4. Morality

0.29

0.08

0.69^*

11.24^**

0.20^*

1^st doping choice

1. Intentions

0.55

0.02

0.78^**

502.05^**

0.88^**

0.80^**

0.78^**

2. Perceived control

0.09

0.03

0.79^*

7.85^*

0.13^*

0.12^*

3. Morality

0.032

0.04

0.79

51

0.03

2^nd doping choice

1. Intentions

0.48

0.02

0.68^**

308.33^**

0.82^**

0.78^**

0.73^**

2. Perceived control

0.05

0.03

0.69

2.01

0.08

0.07

3. Morality

0.06

0.05

0.69

1.62

0.07