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.
Age is a key factor as there is no way a 2.5 year old is mature enough to sit still in a booster seat. Please note that kids should be AT LEAST 4y AND AT LEAST 40 pounds AND mature enough to sit properly (no slouching, no leaning over, no playing with the shoulder belt, etc) before riding in a booster. Your 2.5 year old needs to ride in a 5 point harness.