Table 2 Descriptive statistics and normality

Mothers’ emotional intelligence

1–3

95.1 ± 10.1

2.1 ± 0.2

−0.279

− 0.447

Mothers’ negative parenting behaviour

1–5

26.9 ± 5.7

2.7 ± 0.6

0.201

−0.228

Preschoolers’ attachment instability

1–4

24.7 ± 6.5

2.1 ± 0.5

0.369

−0.497

 Self-control failure

1–4

6.7 ± 2.5

2.2 ± 0.8

0.118

−0.972

 Salience

1–4

6.8 ± 2.6

2.3 ± 0.9

0.233

−0.900

 Serious consequences

1–4

5.7 ± 2.4

1.9 ± 0.8

0.419

−0.998

Preschoolers’ smart device overdependence

1–4

19.1 ± 6.3

2.1 ± 0.7

0.059

−0.819