“…One of the most scrutinized aspects of airport security is x-ray screening of passengers’ carry-on baggage, as this has been associated with significant failure to detect threat objects. For example, Transportation Security Administration (TSA) security screeners at Los Angeles and Chicago airports failed to discover more than 60% of fake bombs in 2006 (Johnstone, 2015). Given that human operators are required to interpret the x-ray images and make decisions about which objects are threats (Graves et al, 2011; Michel & Schwaninger, 2009), developing the relevant skills to support these processes is critical and has been a primary focus of security screening research (Harris, 2002; McCarley, Kramer, Wickens, Vidoni, & Boot, 2004; Schwaninger, 2005).…”