The Frostig development test of visual perception is a set of tests designed to assess aspects of visual perception skills in children, in order for teachers to be able to address learning needs. The tests aim to assess eye-motor coordination, perception of figure-ground, perception of form constancy, perception of position in space, and perception of spatial relationships. Raw scores for each sub-test can be converted to a perceptual age equivalent, representing the age at which the average child achieves this score, and a total perceptual quotient can then be derived in a manner similar to that used for determining an intelligence quotient.
Source: Frostig, M. The Marianne Frostig Development Test of Visual Perception, 1963. Standardization, Perceptual and Motor Skills, 19, (1964) 464-499.