adult
alone
boredom
business
businessman
caucasian
chair
conference
confusion
day
depressed
depression
expertise
failure
frustration
hair
hall
hand
horizontal
indoors
intelligence
lecture
loneliness
loss
male
man
occupation
one
only
participant
people
person
presentation
problem
professional
relaxation
sad
seminar
sitting
stress
stressed
trouble
unhappy
upset
worker
young