“…In an early study, Nunnally, Knott, Duchnowski, and Parker (1967) showed that increasingly louder tones were associated with larger pupil sizes (see also Antikainen & Niemi, 1983;Jones, Loeb, & Cohen, 1977), especially for sound levels above 90 dB (Nunnally et al, 1967). Furthermore, Nunnally et al already indicated the strong order effect on the pupil response (see Jones et al, 1977;Nunnally et al, 1967 3 Unpredictable/infrequent events are associated with larger pupil size/PDR Damsma & Van Rijn, 2017;Friedman et al, 1973;Gilzenrat et al, 2010;Hoffing & Seitz, 2015;Knapen et al, 2016;Korn & Bach, 2016;Marois et al, 2018;Preuschoff et al, 2011;Qiyuan et al, 1985 b ;Steiner & Barry, 2011;Steinhauer & Zubin, 1982;Wetzel et Dlugosch et al, 2013;Fletcher et al, 2016 a ;Kahneman & Beatty, 1967;Kramer et al, 2012;Kun et al, 2013;Liao et al, 2016;Palinko et al, 2010;Recarte & Nunes, 2003;Schlemmer et al, 200510 Ambler et al, 1976Einhäuser et al, 2008;Hoeks & Levelt, 1993;Lisi et al, 2015 4 Increased degradation level is associated with larger pupil size/PDR (up till resource overload) Koelewijn et al, 2012aKoelewijn et al, , 2012bKoelewijn et al, , 2014aKoelewijn et al, , 2014bKoelewijn et al, , 2015…”