Procedure
As stated, participants were randomly attributed to individual
sensory booths illuminated with one of three lighting colors: white,
yellow, and blue. Each participant was asked to consume as much
as they wanted of the breakfast meal under one of these three lighting
colors. Until the breakfast meal was actually served, the
participants did not knowwhat kind of mealwas served in this study.
To control participants’ hunger status, this study was conducted
between 7:30 and 8:30 a.m. All participantswere instructed to refrain
from consuming any foods and beverages, except water, for 12 hours
before participating in this study. Prior to being served a meal, participants
were asked to rate their current hunger/fullness status on
a 9-point Likert scales ranging from 1 (extremely hungry) to 9 (extremely
full). They were also asked to rate their current mood on a
9-point Likert scales ranging from 1 (extremely bad) to 9 (extremely
good). Overall, prior to being served the meal, participants reported
that they were “very hungry” (mean ± SD = 2.6 ± 0.8) and their mood
was “slightly good” (mean ± SD = 6.6 ± 1.6).