Workshop – Auditory Guided Speech Development in Young Children Posted on March 17, 2017March 20, 2017 by Marilee Potthoff Attention Professionals! Register to attend a workshop on “Auditory Guided Speech Development in Young Children,” featuring David J. Ertmer, Ph.D., author of the Open- and Closed-set Task©. The workshop is presented by MED EL on May 19th at John Tracy Clinic in Los Angeles. CEUs available! Posted in LATEST NEWS, NEWS, RECENT NEWS.