1 = Sunthud Group
2 = Chris Group
3 = Pattaraporn Group
4 = Chollada Group
5 = Wanlapa Group
6 = Wikanda Group
7 = Chaiporn Group
8 = Patcharaphol Group

1 = male
2 = female

1 = engineering
2 = science
3 = architecture
4 = education
5 = accounting and business administration
6 = economics
7 = political science
8 = communication arts
9 = laws
10 = arts
11 = fine and applied arts
12 = medicine
13 = pharmarceutical science
14 = allied health science
15 = dentisty
16 = veterianary
17 = psychology
18 = sports science institute

1 = under 2.00
2 = 2.00 - 2.50
3 = 2.51 - 3.00
4 = 3.01 - 3.50
5 = 3.51 - 4.00

1 = very happy
2 = happy
3 = indifferent
4 = unhappy
5 = very unhappy

1 = yes
2 = no

0 = never
1 = seldom
2 = sometimes
3 = always

1 = very little
2 = little
3 = average
4 = much
5 = very much

1 = low
2 = medium
3 = high