PPT Slide
12 female and 12 male test subjects (N=24)
(average age: 27 years, 17-54 range)
Four independent variables:
(1) vision, (2) sound, (3) vibration, (4) draught
Each variable had two values: ON/OFF
Sixteen possible combinations: 24=16 - 1 {all OFF} = 15
All different 15 scenes with at least one presentation media ON are randomly presented to each test subject.
Total sample size: 24 * 15 = 360