“…3 Variation in degree of agreement with statements about amniocentesis among physicians with either the same or different recommendations for 28-year-old and 37-year-old pregnant women pregnancies.^We attribute the increased weight these OB/ GYNs placed on maternal age to two factors, the first being physicians' limited understanding of screening test statistics (Wegwarth, Schwartz, Woloshin, Gaissmaier, & Gigerenzer, 2012). Research has shown that OB/GYNs have gaps in their ability to comprehend statistical concepts (Anderson, Gigerenzer, Parker, & Schulkin, 2014), and, perhaps surprisingly, genetic counselors often need further clarification from the testing laboratory about test results (McGovern, Benach, & Zinberg, 2003). If this is true of genetic counselors with thorough genetics training, it is certainly reasonable to assume that OB/GYNs with minimal genetics training should feel less than confident in their knowledge and interpretation of results.…”