B

SE b

R²

F change

β₁

β₂

β₃

β₄

Intentions

1. Attitudes

0.67

0.05

0.76^**

154.20^**

0.87^**

0.77^**

0.71^**

0.54^**

2. Subjective norms

0.13

0.06

0.78

3.83

0.16

0.15

0.15

3. Perceived behavioral control

0.10

0.10

0.78

1.08

0.09

0.12

4. Morality

0.32

0.14

0.80

2.64

0.22

1^st doping choice

1. Intentions

0.52

0.03

0.84^**

269.58^**

0.92^**

0.87^**

0.82^**

2. Perceived control

0.04

0.04

0.85

0.99

0.07

0.07

3. Morality

0.02

0.03

0.85

0.59

0.03

2^nd doping choice

1. Intentions

0.49

0.03

0.79^**

183.99^**

0.89^**

0.81^**

0.72^**

2. Perceived control

0.49

0.04

0.80

1.78

0.11

0.13

3. Morality

0.02

0.03

0.80

0.86

−0.03