Final answer:
The WPPSI does not clearly state which specific subtest measures verbal concept formation, but the Verbal Comprehension subtest is likely to assess this ability as part of the broader cognitive development and functioning measured by Wechsler's intelligence scales.
Step-by-step explanation:
The WPPSI (Wechsler Preschool and Primary Scale of Intelligence) is an assessment tool used to measure the cognitive development and intellectual functioning in children. While the provided text does not explicitly name the specific WPPSI subtest that measures verbal concept formation, it implies the importance of language function in several subtests, which includes the ability to understand and use words, both verbs and nouns, associated with objects and actions. This is integral to verbal concept formation, and difficulties in language can be linked to impairments in specific cerebral regions. In the context of intelligence assessments like the WPPSI, subtests like Verbal Comprehension may be responsible for evaluating such abilities in young children.
Furthermore, the WPPSI, along with other Wechsler scales such as the WAIS (Wechsler Adult Intelligence Scale) and the WISC (Wechsler Intelligence Scale for Children), provides a composite score that includes a variety of cognitive domains. David Wechsler believed that intelligence was multi-faceted, combining both verbal and nonverbal skills. Therefore, the subtest from the WPPSI that measures verbal concept formation would likely fall under the domain assessing verbal comprehension and reasoning.