In response to parents' requests, Aristotle Circle worked with our experts to develop two at-home ERB/WPPSI™-III diagnostic tests. Practice Test 1 is included with the purchase of the Complete ERB/WPPSI™-III Practice Workbook. These diagnostic Practice tests are designed to help parents identify a child's areas of strength and weakness relative to specific ERB and WPPSI™-III subtests. Parents may then focus activities to help build the skills assessed on the ERB / WPPSI™-III test itself. Familiarity with the test format, structure and question types should instill confidence and ensure that your child performs to the best of his or her ability.