FOOD STIMULI AND GENDER

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settings were adjusted based on previous studies to suit this study. These settings were also
verified with Tobii AB Technology. The IV-T filter settings used were as follows:
•

30o Velocity Threshold (Nijs et al., 2010)

•

100 ms for fixations (Doolan, Breslin, Hanna, Murphy, & Gallagher, 2014;
Mogg, Bradley, Field, & De Houwer, 2003; Nijs et al., 2010; Popien, Frayn,
von Ranson, & Sears, 2015; Werthmann et al., 2011)

•

20 ms window length

•

Noise reduction: off

•

Gap fill-in: off

•

Merge adjacent fixations: off

Four eye-tracking measurements were chosen for statistical analysis:
•

Total visit duration (TVD) is “the total time each participant has visited each
AOI on all Media, including averages, medians, sums, and the share of total
time spent in each AOI out of all AOIs” (Tobii AB Technology, 2015).

•

Visit count (VC) is “the number of visits within each AOI on all Media,
including averages, medians, and the percentage of participants that fixated
within each AOI at least once” (Tobii AB Technology, 2015).

•

Total fixation duration (TFD) is “the total time each participant has fixated
each AOI on all Media, including averages, median, sums, and the share of
total time spent in each AOI out of all AOIs” (Tobii AB Technology, 2015).

•

Fixation count (FC) is “the number of fixation within each AOI on all Media,
including averages, medians, sums, total number of fixations within the
Analysis Set, and the total Analysis Set and Recording Durations” (Tobii AB
Technology, 2015).