WESTBRÜCK NAVIGATION STUDY

 

VALIDATION CHECK

A Collaboration Project

Osnabrück Uni - OVGU

Safa Andac

Prof. Peter König

Prof. Michael Hoffmann

  • Recruitment
  • Setbacks -- Problems
  • Pipeline Overview
  • Data Overview
  • Westbrück Paradigm
  • Improvements?

Outline

PARADIGM

1. Visual Function Measurement

  • Eye Examination
  • Visual Acuity
  • Visual Field
  • OCT

2. Exploration in Westbrück

3. Point to Building (PTB)

  • 24 Tasks in 2 blocks
  • No time limit
  • 30 minutes in 3 blocks

RECRUITMENT

Recruited Exploration PTB(*)
Control (HC) 13 9 8
Glaucoma (GL) 15 7 3
Total 28 16 11
Exclusion Ophth. Char. Cybersickness Others
Control (HC) 2 1 - (1*) 1
Glaucoma (GL) 4 2 - (2*) 2 - (2*)
Total 6 3 - (3*) 3 - (2*)

SETBACKS -- PROBLEMS

  • Eye Tracking Validation -- Smooth Pursuit
  • Eye Tracking Calibration
  • Cybersickness
  • VR Duration (Cases > 2h)

PIPELINE OVERVIEW

3. Check missing data ratio -- Threshold 30%

4. Interpolation (Walter et al. 2022)

5. Gaze-Noise Label (Gaze defined > 266 ms)

2. Condense Data -- Merge Same Gaze Seq.

1. Format Transform (JSON to CSV)

0. Simulation for Validation?

DATA OVERVIEW

-- Missing Data -- Truncated

All data satisfy

missing data condition < 30%

 

Except few < 10%

 

Yellow highlight indicates GL

DATA OVERVIEW

-- Gaze vs Noise (based on a threshold 266.66 ms)

Gaze counts are similar (p = 0.09)

Duration?

Most are labeled as noise

HC

GL

DATA OVERVIEW

-- Simulation for Validation?

HC (2024) -- Exploration Block 1

HC (2024) -- Exploration Block 3

Random pick example for HC

Body Tracker as the reference

DATA OVERVIEW

-- Simulation for Validation?

GL (2014) -- Exploration Block 1

GL (2014) -- Exploration Block 3

Random pick example for GL

Body Tracker as the reference

DATA OVERVIEW

-- Simulation for Validation?

HC (2024) -- Exploration Block 2

Park Area?

DATA OVERVIEW

-- Simulation for Validation?

  • Eye Tracking Simulation?
  • Raycasting for Gaze Behavior?
  • Eye Tracking Validation?
  • Simulation Proof of Concept Ready

IMPROVEMENTS?

  • PTB Validation
  • Validation Experiment for Eye Tracking Calibration?
  • Gaze-Noise Threshold Adjustment?
  • Your contributions
  • Simulation
  • ...

-- Adjustments & Additions

THANKS!

westbrueck_sanity_check

By Safa Andac

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westbrueck_sanity_check

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