Each item scored on a 5 point scale (range 0-4) and measure of symptom severity is obtained by summing item scores. To obtain a measure of symptom severity, sum marked responses of the total and/or the respective sub-scales. Mean score: divide sum-score by respective number of scale items.
Laws aside, kids aren't ready to make the switch from a booster seat to seat belts until they're at least 4 feet 9 inches tall and can pass the five-step test below â typically between ages 8 and 10.
All children younger than 12 years and smaller than 150 cm (4 ft 11 in) must use a booster seat or child-safety seat appropriate to their weight. The Department of Transport advises that children continue to use a seat when they are 12 years or older but smaller than 150 cm (4 ft 11 in).