NTN Tests - IMPACT Juvenile Corrections Department Testing IMPACT Juvenile Correction Officer Testing IMPACT is a video-based multiple-choice, pre-employment testing system designed specifically for employees who interact directly with juveniles who are in the system, including offenders. IMPACT Testing consists of 33 real-life job scenarios depicting realistic encounters with juveniles, supervisors and fellow officers. Candidates must analyze each situation and determine the best response to the situation. All information that may be needed to answer a question is provided in the test. IMPACT is not designed to be a test of policy or technical components and candidates are asked to only know what is stated during the video. There is no study guide for IMPACT.