Table 2 Measurement of behavioral determinants: items and psychometric properties
From: Effectiveness of a worksite mindfulness-based multi-component intervention on lifestyle behaviors
Determinant | Item (on a 7-point Likert scale) | Cronbach’s α | ||
|---|---|---|---|---|
T0 | T1 | T2 | ||
Perceived behavioral control | Exercising vigorously for at least 3 times 20 minutes this week is for me (completely possible – completely impossible) | .76 | .67 | .70 |
Physical activity | If I wanted to, I could exercise vigorously for at least 3 times 20 minutes this week (I completely agree- I completely disagree) | |||
How much control do you experience on the amount of vigorous physical activity you have this week? (no control – complete control)* | ||||
The extent to which I exercise vigorously this week is mostly up to me. (completely agree- completely disagree) | ||||
Perceived behavioral control | Eating at least 2 pieces of fruit per day this week is for me (completely possible – completely impossible) | .40** | .28** | .30** |
Fruit intake | If I wanted to, I could eat at least 2 pieces of fruit per day this week (I completely agree- I completely disagree) | |||
How much control do you experience on the amount of fruit you eat this week? (no control – complete control)* | ||||
The extent to which I eat fruit this week is mostly up to me. (completely agree- completely disagree) | ||||
Intention | I intend to exercise vigorously for at least 3 times 20 minutes this week. (completely agree- completely disagree) | .94 | .90 | .86 |
Physical activity | I try to exercise vigorously for at least 3 times 20 minutes this week. (completely agree- completely disagree) | |||
Intention | I intend to eat daily at least 2 pieces of fruit this week. (completely agree- completely disagree) | .96 | .94 | .93 |
Fruit intake | I try to eat daily 2 pieces of fruit this week. (completely agree- completely disagree) | |||
Perceived barriers (lack of time) | I do not have enough time to engage in vigorous physical activity at least 3 times for 20 minutes this week, because of my work. (completely agree- completely disagree)* | .71 | .82 | .76 |
Physical activity | I do not have enough time to engage in vigorous physical activity at least 3 times for 20 minutes this week, because of my family life/ social life. (completely agree- completely disagree)* | |||