Table 5 Descriptive statistics and differences between students and non-student adults.

From: Use of refillable bottles by Italian students and non-student adults: testing an extended model of the theory of planned behavior

Constructs

All participants (n = 835)

Students (n = 429)

Non-student adults (n = 406)

F univariate

η2

 

M(SD)

M(SD)

M(SD)

  

Past behavior

3.92 (1.35)

4.24 (1.15)

3.59 (1.46)

52.67***

0.06

Attitude

6.33 (0.79)

6.42 (0.72)

6.24 (0.85)

10.61***

0.01

Subjective norm

3.57 (0.85)

3.59 (0.64)

3.56 (0.86)

0.232

0.00

PBC

4.31 (0.69)

4.38 (0.65)

4.24 (0.72)

7.91**

0.01

Self-identity

4.06 (0.81)

4.06 (0.78)

4.05 (0.83)

0.025

0.00

Intention

4.46 (0.75)

4.56 (0.68)

4.35 (0.84)

15.91***

0.02

Future behavior

3.80 (1.32)

4.11 (1.17)

3.49 (1.39)

49.09***

0.06

  1. Response scale ranged from 1 to 5, except for Attitude, which ranged from 1 to 7. Future behavior = using a refillable bottle. ***p < 0.001, **p < 0.01.
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