How soon can the Bayley III be re administered in order to measure growth?
The types of items administered to infants are unlikely to be "learned" or to produce practice effects, so children can be readministered the Bayley–III in a shorter time frame. An interval of approximately 3 months is recommended for children under 12 months of age; an interval of approximately 6 months is recommended for children older than 12 months, although shorter intervals can be used if warranted.