Final answer:
The Perceptual Reasoning Index (PRI) measures an individual's ability to interpret non-verbal information and solve complex problems, assessing ranges of cognitive abilities like spatial processing and visual-motor integration.
Step-by-step explanation:
The Perceptual Reasoning Index (PRI) is a score derived from certain subtests on the Wechsler Intelligence Scale for Children (WISC) and Wechsler Adult Intelligence Scale (WAIS) that measure a person's ability to interpret non-verbal and visual information.
The PRI includes tasks that assess an individual's capacity for consciousness, particularly in relation to the perception of stimuli and the ability to feel pain, as well as reasoning, which involves the developed capacity to solve new and complex problems without relying solely on prior knowledge. The secondary capacities of the PRI encompass a range of cognitive abilities such as spatial processing, visual-motor integration, and non-verbal concept formation.