An 8-year-old girl is provided a few cubes and asked to create the structure in the image provided (Structure A: an irregular block arrangement; Structure B: a staircase arrangement). If she can create Structure A, but cannot make Structure B, her developmental quotient (DQ) in the fine motor domain is:
50
DQ = (Developmental age / Chronological age) x 100. The simpler cube arrangement (Structure A) corresponds to a fine-motor developmental age of about 4 years, while the more complex staircase (Structure B) corresponds to about 6 years. Since the child can only achieve Structure A, her developmental age is 4 years against a chronological age of 8 years, giving DQ = (4/8) x 100 = 50.
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