This is from Sattler/Dumont, Assessment of Children: WISC IV and WPPSI III supplement, 2004:
"Picture concepts, a core Perceptual reasoning subtest, requires the child to look at two or three rows of pictures and then select from each row one picture that best goes together with the other selection(s) to form a concept. The task is to find a common element in the pictures that forms a category, concept, or classification... Picture concepts appears to measure abstract, categorial reasoning based on perceptual recognition processes. The task is to scan an array of pictures and determine which pictures have a common characteristics. The child first must recognize or identify each picture and then determine a quality that picture in one row shares with a picture in another row."
Not sure what that really says, but... a description of the subtest.
