Table 1 Means, standard deviations, the number of identified extreme outliers that were removed, bivariate correlations, and Cronbach’s alphas for all the study variables

1

T1 Identity leadership formal leader

5.99

.86

3

(.94)

2

T2 Identity leadership formal leader

6.22

.86

0

.39^***

(.96)

3

T1 Identity leadership extra peer leaders

5.37

1.19

0

.40^***

.33^***

(.96)

4

T2 Identity leadership task leader

6.17

.77

1

.30^***

.65^***

.38^***

(.97)

5

T2 Identity leadership motivational leader

6.11

.85

0

.23^***

.53^***

.30^**

.80^***

(.98)

6

T2 Identity leadership social leader

6.07

.89

0

.33^**

.54^***

.32^***

.76^***

.79^***

(.98)

7

T1 Group identification

5.51

1.05

2

.49^***

.39^***

.42^***

.37^***

.35^***

.32^***

(.90)

8

T2 Group identification

5.81

.95

1

.25^***

.50^***

.35^***

.48^***

.53^***

.58^***

.45^***

(.91)

9

T1 Group cohesion

4.87

1.19

0

.38^***

.29^***

.50^***

.34^***

.37^***

.38^***

.63^***

.36^***

(.91)

10

T2 Group cohesion

4.97

1.12

0

.15^*

.30^***

.41^***

.46^***

.43^***

.50^***

.39^***

.56^***

.58^***

(.88)

11

T1 Well-being

3.86

.54

1

.23^***

.15^**

.17^**

.22^**

.10

.11

.28^***

.23^***

.13^*

.14^*

(.93)

12

T2 Well-being

3.93

.50

3

.23^***

.23^***

.23^***

.22^**

.17^*

.16^*

.32^***

.32^***

.26^***

.19^***

.70^***

(.94)

13

T1 Walking activity

864.98

856.70

14

−.07

.04

.02

.07

−.01

−.01

.08

.03

.03

.04

.12^*

.10

a

14

T2 Walking activity

1308.08

1016.25

12

.09

.07

.01

.01

.04

−.03

.14^*

.13^*

.10

.13^*

.08

.15^*

.19^**

a