Bill Kanasky, Jr., Ph.D. shares insights with attorneys for witness prep prior to their witness's deposition testimony. Bill emphasizes that the most important thing for witnesses is to fail during preparation in order to learn and grow so they are prepared for their deposition. This approach can be a challenge for attorneys as you don't want your witness to get mad at you or you may have concerns about hurting their confidence during the prep. It is critical for the witness to understand that their failure during preparation has value and is actually necessary in order for them to be successful during testimony. As you start your mock questioning and you observe them failing, stop and give them feedback to build awareness of their performance. How you give them feedback is very important. You have to use operant conditioning and provide both constructive and positive feedback in order to punish poor performance -  to eliminate it - and reward good behavior - to increase it. The use of these psychological principles will help you fully prepare your witness by allowing them to fail during prep and providing them with the appropriate feedback so they are ready for the real thing.  Watch the video of this episode: https://www.courtroomsciences.com/r/hPR