Table 4 Mean values of screen time and determinants of screen time
| Â | Vocational school Mean (sd) | Â | High school Mean (sd) | Â | Â | Â | Â | Â | ||
|---|---|---|---|---|---|---|---|---|---|---|
|  | Boys (N = 201) | Girls (N = 256) | Total (N = 457) | Boys (N = 48) | Girls (N = 96) | Total (N = 144) | School p | School η2 | Gender p | School x Gender interaction p |
Screen time | ||||||||||
 Weekday | 3.5 (2.2) | 2.8 (1.8) | 3.1 (2.0) | 3.2 (1.6) | 2.3 (1.6) | 2.6 (1.6) | .039 | .007 | .000 | .708 |
 Weekend | 3.7 (2.2) | 3.3 (2.0) | 3.5 (2.1) | 3.8 (1.7) | 3.4 (1.8) | 3.5 (1.8) | .707 | .000 | .040 | .907 |
 Opportunity | ||||||||||
  Injunctive norm | 4.7 (1.7) | 4.5 (1.8) | 4.6 (1.7) | 4.9 (1.6) | 4.6 (1.8) | 4.7 (1.8) | .293 | .002 | .189 | .754 |
  Descriptive norm | 4.4 (1.4) | 4.2 (1.7) | 4.3 (1.6) | 4.6 (1.4) | 4.2 (1.7) | 4.4 (1.6) | .473 | .001 | .056 | .551 |
  Parents restrict screen time | 3.0 (1.7) | 2.5 (1.8) | 2.7 (1.8) | 3.3 (1.7) | 2.7 (1.9) | 2.9 (1.8) | .118 | .004 | .003 | .649 |
   No screen time rules at home | 4.7 (2.0) | 4.9 (2.2) | 4.8 (2.1) | 4.6 (1.9) | 4.9 (2.1) | 4.8 (2.0) | .888 | .000 | .205 | .620 |
   TV, play console and computer in room | 4.9 (2.1) | 4.5 (2.3) | 4.7 (2.2) | 5.2 (2.1) | 3.9 (2.3) | 4.4 (2.3) | .599 | .000 | .000 | .044 |
 Motivation | ||||||||||
  Positive OE a | 4.7 (1.4) | 4.7 (1.4) | 4.7 (1.4) | 5.3 (1.2) | 4.9 (1.2) | 5.1 (1.2) | .003 | .014 | .087 | .136 |
  Negative OE | 4.3 (1.4) | 4.9 (1.5) | 4.6 (1.5) | 4.1 (1.5) | 5.0 (1.4) | 4.7 (1.5) | .976 | .000 | .000 | .400 |
  Instrumental attitude | 3.5 (1.6) | 2.9 (1.6) | 3.2 (1.6) | 3.3 (1.4) | 2.6 (1.5) | 2.9 (1.5) | .123 | .004 | .000 | .820 |
  Affective attitude | 4.0 (1.3) | 3.4 (1.3) | 3.7 (1.3) | 4.0 (1.4) | 3.3 (1.5) | 3.6 (1.5) | .964 | .000 | .000 | .908 |
  Intention | 4.5 (1.9) | 3.9 (2.0) | 4.1 (1.9) | 4.6 (1.9) | 4.0 (2.2) | 4.2 (2.1) | .523 | .001 | .003 | .954 |
  ST identity | 4.3 (1.3) | 4.2 (1.3) | 4.2 (1.3) | 4.6 (1.1) | 4.3 (1.6) | 4.4 (1.5) | .103 | .004 | .150 | .369 |
  SE & PBC | 5.4 (1.6) | 5.6 (1.6) | 5.5 (1.6) | 5.8 (1.5) | 5.7 (1.7) | 5.8 (1.6) | .122 | .004 | .766 | .479 |
  Automaticity | 4.1 (1.5) | 4.4 (1.7) | 4.2 (1.6) | 4.7 (1.2) | 4.3 (1.9) | 4.4 (1.7) | .081 | .005 | .696 | .028 |