Table 2 Matrix for preschoolers at the individual level of the ToyBox-study intervention

PO.1. Children decrease their total sitting time per day at kindergarten.

A.1. Children express positive feelings towards devoting less time sitting down at kindergarten.

P.1. Children prefer to stand up instead of sitting down in the classroom or at kindergarten.

SE.1. Children express confidence about decreasing their total sitting time per day at kindergarten, even when the other children want to sit down/are sitting down.

C.1. Children are capable of decreasing their total sitting time per day at kindergarten.

PO.2. Children decrease their total sitting time per day at home or during leisure time.

A.2. Children express positive feelings towards being less sedentary, at home or during leisure time.

P.2. Children prefer to stand up instead of sitting down at home or during leisure time.

SE.2. Children express confidence about decreasing their total sitting time per day at home or during leisure time, even when their siblings are sitting down.

C.2. Children are capable of decreasing their total sitting time per day at home or during leisure time.

PO.3. Children limit screen viewing to one hour per day at kindergarten.

A.3. Children express positive feelings towards limiting their screen viewing time by doing other non-sedentary activities at kindergarten.

P.3. Children indicate that they prefer to limit their screen viewing (e.g., TV viewing time, computer time, etc.) to less than one hour per day at kindergarten.

SE.3. Children express confidence about limiting their screen viewing to less than one hour per day at kindergarten, even when the other children are watching TV, playing on the computer or doing other screen viewing activities.

C.3. Children are capable of limiting their screen viewing time to less than one hour per day at preschool.

PO.4. Children limit screen viewing to one hour per day or less at home (with help from their parents/caregivers).

A.4. Children express positive feelings towards limiting their screen viewing time (with help from their parents/caregivers) by doing other activities at home.

P.4. Children prefer to limit their screen viewing (e.g., TV viewing time, computer time, etc.) to one hour per day or less at home (with help from their parents/caregivers).

SE.4. Children express confidence about limiting their screen viewing time to one hour per day (with help from their parents/caregivers) or less at home, even when their siblings are watching TV, playing on the computer or doing other screen viewing activities.

C.4. Children are capable of limiting their screen viewing time to one hour per day or less at home (with help from their parents/caregivers).

PO.5. Children switch from sitting down to standing up for some activities.

A.5. Children express positive feeling towards switching from sitting down to standing up for some activities.

P.5. Children prefer to switch from sitting down to standing up for some activities.

SE.5.a. Children express confidence about switching from sitting down to standing up, even when the other children do these activities sitting down.

C.5. Children are capable of switching from sitting down to standing up for some activities.

SE.5.b. Children express confidence about switching from sitting down to standing up, even when the teacher does not give prompts to do this.