Questionnaire data were entered manually and analysed using SPSS v.20.0. All
Likert-scale items were coded on a scale from 1 to 4. Students were excluded from
the analysis if they were missing any data on the questionnaire. This resulted in a
final sample consisting of 348 grade 4 students (56% female and 44% male).
Principal component factor analysis carried out using the promax rotation
extracted three distinct components with an eigenvalue greater than 1 explaining
68.9% of the variance. Indicators of factorability were good (KMO ¼ .850; Bartlett’s
test p , .001). The three components corresponded exactly with the three scales
given in Table 1. The reliability of scales was determined to be high with Cronbach’s
alpha ranging from .649 to .868 (Table 3). Scores for each scale were computed for
every student by adding together the score for each item in the scale. Descriptive statistics
can be found in Table 3.