Advanced

Real-time sharing of gaze data between multiple eye trackers : evaluation, tools, and advice

Nyström, Marcus LU ; Niehorster, Diederick C LU ; Cornelissen, Tim and Garde, Henrik LU (2016) In Behavior Research Methods
Abstract
Technological advancements in combination with significant reductions in price have made it practically feasible to run experiments with multiple eye trackers. This enables new types of experiments with simultaneous recordings of eye movement data from several participants, which is of interest for researchers in, e.g., social and educational psychology. The Lund University Humanities Laboratory recently acquired 25 remote eye trackers, which are connected over a local wireless network. As a first step toward running experiments with this setup, demanding situations with real time sharing of gaze data were investigated in terms of network performance as well as clock and screen synchronization. Results show that data can be shared with a... (More)
Technological advancements in combination with significant reductions in price have made it practically feasible to run experiments with multiple eye trackers. This enables new types of experiments with simultaneous recordings of eye movement data from several participants, which is of interest for researchers in, e.g., social and educational psychology. The Lund University Humanities Laboratory recently acquired 25 remote eye trackers, which are connected over a local wireless network. As a first step toward running experiments with this setup, demanding situations with real time sharing of gaze data were investigated in terms of network performance as well as clock and screen synchronization. Results show that data can be shared with a sufficiently low packet loss (0.1 %) and latency (M = 3 ms, M A D = 2 ms) across 8 eye trackers at a rate of 60 Hz. For a similar performance using 24 computers, the send rate needs to be reduced to 20 Hz. To help researchers conduct similar measurements on their own multi-eye-tracker setup, open source software written in Python and PsychoPy are provided. Part of the software contains a minimal working example to help researchers kick-start experiments with two or more eye trackers.
(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
epub
subject
in
Behavior Research Methods
pages
13 pages
publisher
The Psychonomic Society
external identifiers
  • Scopus:84991070351
ISSN
1554-351X
DOI
10.3758/s13428-016-0806-1
language
English
LU publication?
yes
id
dcf1ded3-0a73-4039-a012-2ca051479bfd
date added to LUP
2016-08-23 12:48:38
date last changed
2016-11-06 04:39:39
@misc{dcf1ded3-0a73-4039-a012-2ca051479bfd,
  abstract     = {Technological advancements in combination with significant reductions in price have made it practically feasible to run experiments with multiple eye trackers. This enables new types of experiments with simultaneous recordings of eye movement data from several participants, which is of interest for researchers in, e.g., social and educational psychology. The Lund University Humanities Laboratory recently acquired 25 remote eye trackers, which are connected over a local wireless network. As a first step toward running experiments with this setup, demanding situations with real time sharing of gaze data were investigated in terms of network performance as well as clock and screen synchronization. Results show that data can be shared with a sufficiently low packet loss (0.1 %) and latency (M = 3 ms, M A D = 2 ms) across 8 eye trackers at a rate of 60 Hz. For a similar performance using 24 computers, the send rate needs to be reduced to 20 Hz. To help researchers conduct similar measurements on their own multi-eye-tracker setup, open source software written in Python and PsychoPy are provided. Part of the software contains a minimal working example to help researchers kick-start experiments with two or more eye trackers.<br/>},
  author       = {Nyström, Marcus and Niehorster, Diederick C and Cornelissen, Tim and Garde, Henrik},
  issn         = {1554-351X},
  language     = {eng},
  month        = {10},
  pages        = {13},
  publisher    = {ARRAY(0xb7b9fd0)},
  series       = {Behavior Research Methods},
  title        = {Real-time sharing of gaze data between multiple eye trackers : evaluation, tools, and advice},
  url          = {http://dx.doi.org/10.3758/s13428-016-0806-1},
  year         = {2016},
}