An observational infant motor scale that scores spontaneous movement in prone, supine, sitting, and standing is MOST useful because it:

• 1 Identifies infants whose motor development is delayed so early intervention can begin ✓ 정답
• 2 Determines the exact genetic cause of a developmental delay
• 3 Measures muscle strength in kilograms at each individual joint
• 4 Predicts the child's eventual adult height and body weight

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