Comparing perceptions between haptic length and actual length

1
Comparing perceptions between haptic length and
actual length
EECE700B Introduction to Haptics

• Project I Proposal
• Date 2007.4.9
• Presenter Jaehyun Park (UI Lab.)

2
Introduction

• Motivation
• How different are Virtual Reality and Actual
  Reality in human perception?
• Background
• Stevens power law
• ? k F a
• If ?1 ?2, then k1 F1 a1 k2 F2 a2
• Objective
• Comparing perceptions between haptic line length
  perceived through PHANToM OMNI device and actual
  line length

3
Experimental design

• Task
• Magnitude production task
• Numeric estimates and haptic line length
• Experimental prototype
• Using PHANToM OMNI so that subjects can draw a
  line
• The line that subjects draw is automatically
  logged by system
• Variables
• Dependent variable
• Length of lines which subject draw through
  PHANToM OMNI
• Independent variable
• Numeric estimates will be randomly generated

4
Analysis

• Deriving power exponent of haptic line length
  (a1)
• Applying Stevens power law
• Conducting a simple linear regression analysis
• Alternatives
• Hypothesis0 a1 1
• Hypothesisa a1 ? 1
• (a1 power exponents of haptic line length,
  where power exponents of actual line length is 1)
• Decision rule
• If a1 ? 1, then reject hypothesis0
• It means perception dimension of haptic line
  length and actual line length is different