Table 5.

Overview of the functionalities discussed in the included papers (literature sources in parentheses)

Discussed functionality	Aviation	Driving	Walking	All areas
Monitoring	1 (Brams et al., 2018SA)	4 (Doshi & Trivedi, 2012MD; Edquist et al., 2011A,E; Gaspar et al., 2016MD,CL; Kountouriotis et al., 2011)	7 (Feld & Plummer, 2019MD; Jovancevic et al., 2006MD; Marigold et al., 2007; Marigold & PatlaO, 2008; Miyasike-daSilva et al., 2011; Miyasike-daSilva & McIlroy, 2016MD; Murray et al., 2014O)	12
Presaccadic preview	0	8 (Danno et al., 2011ES; Huestegge & Bröcker, 2016AF; Luoma, 1984; Mourant & Rockwell, 1970E,MD; Shahar et al., 2012E; Shinoda et al., 2001; Strayer et al., 2003MD; Underwood et al., 2003E)	2 (Luo et al., 2008; Tong et al., 2017)	10
Saccade/eccentricity costs	0	5 (Kountouriotis & Merat, 2016MD; Lamble et al., 1999E, MD; Lehtonen et al., 2018E; Seya et al., 2013CL; Summala et al., 1996E,CL)	0	5
Action planning	1 (Yu et al., 2014SA)	1 (Cooper et al., 2013CL)	4 (Berencsi et al., 2005O; Marigold & PatlaO, 2008; Miyasike-daSilva et al., 2019O; Patla, 1998O)	6
Other	0	3 (Alberti et al., 2014E; Lehtonen et al., 2014E; Zhang et al., 2016E,ES)	2 (Bardy et al., 1999; Timmis et al., 2017MD)	5
None*	4 (Imbert et al., 2014; Kim et al., 2010E; Robinski & SteinE, 2013E; Schaudt et al., 2002MD)	15 (Beh & Hirst, 1999MD; Bian et al., 2010MD,CL; Briggs et al., 2016MD,CL; Crundall et al., 2002E,MD; Crundall et al., 2004CL; Harbluk et al., 2007MD; Janelle et al., 1999ES; Lin & Hsu, 2010MD; Mayeur et al., 2008CL; Patten et al., 2006E; Tsai et al., 2007MD; Underwood et al., 2005A; Victor et al., 2005MD,CL; Zhao et al., 2014E; Zwahlen, 1989)	4 (Cinelli et al., 2009; Hasanzadeh et al., 2018SA; Ioannidou et al., 2017MD; King et al., 2009A)	24
Sum	6	37	19	62

Two studies (Marigold & Patla, 2008; Mourant & Rockwell, 1970) mentioned two functionalities, so that the sum of functionalities is 62, although we only included 60 studies

* Studies mentioned in the “None” category did not explicitly mention a specific functionality. Some studies discussed a functionality between the lines. Please see text for these interpretations.

Abbreviations in exponent notes. E – Expertise, MD – multitasking and distraction, CL – cognitive load, A – age, AF – action before fixation, ES – emotions and stress, SA – situational awareness, O – occlusion