Commitment

Control

Challenge

Item

Mean ± SD

Alpha of Cronbach after suppression of item

Mean ± SD

Alpha of Cronbach after suppression of item

Mean ± SD

Alpha of Cronbach after suppression of item

Item 1

1.81 ± 0.95

0.52

-

-

-

-

Item 4

0.66 ± 0.99

0.53

-

-

-

-

Item 7

2.01 ± 0.89

0.47

-

-

-

-

Item 10

1.74 ± 0.93

0.52

-

-

-

-

Item 13

0.86 ± 0.98

0.51

-

-

-

-

Item 2

-

-

1.83 ± 1.01

0.48

-

-

Item 6

-

-

1.95 ± 0.94

0.46

-

-

Item 12

-

-

0.83 ± 1

0.47

-

-

Item 15

-

-

1.68 ± 1.1

0.49

-

-

Item 8

-

-

0.80 ± 0.98

0.52

-

-

Item 5

-

-

-

-

2.49 ± 0.90

0.51

Item 9

-

-

-

-

1.59 ± 1.04

0.48

Item 3

-

-

-

-

0.81 ± 1.00

0.50

Item 11

-

-

-

-

1.21 ± 1.09

0.49

Item 14

-

-

-

-

1.34 ± 1.14

0.53