“…For example, researchers have indicated that the perceptual-cognitive skills of referees and players can be improved via diverse on- and off-field training tools. During these sport-specific training programs, the focus should be on improving specific aspects of performance (Put, Wagemans, Spitz, Williams, & Helsen, 2015; Schweizer, Plessner, Kahlert, & Brand, 2011). Also, in other professional settings, such as airport baggage screening, medical screening, and law enforcement, findings from (basic) visual search studies have had important applications for training and performance enhancement (Evans, Birdwell, & Wolfe, 2013; Helsen & Starkes, 1999b; Vickers & Lewinski, 2012; Wolfe, Brunelli, Rubinstein, & Horowitz, 2013).…”