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.
Before going in a booster, a child should be:: 1  AT LEAST 4 years old. 2  AT LEAST 40 pounds.  Mature enough to sit properly in the booster (no slouching, leaning over, playing with the shoulder belt, etc)