A study by Pittini et al. (A-38) assessed the effectiveness of a simulator-based curriculum on 30 trainees learning the basic practice of amniocentesis. Pre- and post-training performance were evaluated with the same instrument. The outcome variable was the post-training score—pretraining score. Trainees were grouped by years of postgraduate experience: PGY 0–2, PGY 3–5, Fellows, and Faculty.