Participants.
Forty nine psychology students (31 male and 18 female,
aged M = 24:47; SD = 6:53) took part in the experiment
after signing the consent form. Six subjects were excluded
from the analysis due to eye tracking system calibration
problems resulting in low tracking ratio or due to
procedural problems.
Procedure and stimuli
Before experimental procedure, the calibration of eye
tracking device and tting of EEG headset were executed.
During the whole procedure eye movements and brain
activity data were recorded. The whole procedure took
approximately 20 minutes to complete.
The procedure consisted of two stages: mood induction
and free viewing of art paintings on the computer screen.
Mood induction followed the procedure proposed by
Velten [18]. Participants were randomly assigned to one
of the experimental conditions: positive mood or neutral
mood. Participants in both condition were presented 20
positive or emotionally neutral sentences. Each sentence
was presented for 12 seconds on the computer screen.
The participants' task was to read all sentences and nd
for each of them relevant situations from their own life.
During reading, classical music pieces, emotionally
consistent with sentences, were played [12, 13]