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.
If a child is older than 8 years old or over 57 inches tall, they are not required by law to ride in a booster seat. Best practice however would be to keep children under 57 inches riding in a booster until they meet the height requirement, regardless of age.