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Appraising the intention of other people : Ecological validity and procedures for investigating effects of lighting for pedestrians

Fotios, S. and Johansson, M. LU (2019) In Lighting Research and Technology 51(1). p.111-130
Abstract

One of the aims of outdoor lighting in public spaces, such as pathways and subsidiary roads, is to help pedestrians to evaluate the intentions of other people. This paper discusses how a pedestrians' appraisal of another persons' intentions in artificially lit outdoor environments can be studied. We review the visual cues that might be used, and the experimental design with which effects of changes in lighting could be investigated to best resemble the pedestrian experience in artificially lit urban environments. Proposals are made to establish appropriate operationalisation of the identified visual cues, choice of methods and measurements representing critical situations. It is concluded that the intentions of other people should be... (More)

One of the aims of outdoor lighting in public spaces, such as pathways and subsidiary roads, is to help pedestrians to evaluate the intentions of other people. This paper discusses how a pedestrians' appraisal of another persons' intentions in artificially lit outdoor environments can be studied. We review the visual cues that might be used, and the experimental design with which effects of changes in lighting could be investigated to best resemble the pedestrian experience in artificially lit urban environments. Proposals are made to establish appropriate operationalisation of the identified visual cues, choice of methods and measurements representing critical situations. It is concluded that the intentions of other people should be evaluated using facial emotion recognition; eye-tracking data suggest a tendency to make these observations at an interpersonal distance of 15 m and for a duration of 500 ms. Photographs are considered suitable for evaluating the effect of changes in light level and spectral power distribution. To support investigation of changes in spatial distribution, further investigation is needed with three-dimensional targets. Further data are also required to examine the influence of glare.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Lighting Research and Technology
volume
51
issue
1
pages
20 pages
publisher
SAGE Publications Inc.
external identifiers
  • scopus:85040330902
ISSN
1477-1535
DOI
10.1177/1477153517737345
language
English
LU publication?
yes
id
130820de-253b-43ae-b4b4-d09077c1508b
date added to LUP
2019-05-28 22:53:33
date last changed
2019-08-13 16:20:52
@article{130820de-253b-43ae-b4b4-d09077c1508b,
  abstract     = {<p>One of the aims of outdoor lighting in public spaces, such as pathways and subsidiary roads, is to help pedestrians to evaluate the intentions of other people. This paper discusses how a pedestrians' appraisal of another persons' intentions in artificially lit outdoor environments can be studied. We review the visual cues that might be used, and the experimental design with which effects of changes in lighting could be investigated to best resemble the pedestrian experience in artificially lit urban environments. Proposals are made to establish appropriate operationalisation of the identified visual cues, choice of methods and measurements representing critical situations. It is concluded that the intentions of other people should be evaluated using facial emotion recognition; eye-tracking data suggest a tendency to make these observations at an interpersonal distance of 15 m and for a duration of 500 ms. Photographs are considered suitable for evaluating the effect of changes in light level and spectral power distribution. To support investigation of changes in spatial distribution, further investigation is needed with three-dimensional targets. Further data are also required to examine the influence of glare.</p>},
  author       = {Fotios, S. and Johansson, M.},
  issn         = {1477-1535},
  language     = {eng},
  month        = {01},
  number       = {1},
  pages        = {111--130},
  publisher    = {SAGE Publications Inc.},
  series       = {Lighting Research and Technology},
  title        = {Appraising the intention of other people : Ecological validity and procedures for investigating effects of lighting for pedestrians},
  url          = {http://dx.doi.org/10.1177/1477153517737345},
  volume       = {51},
  year         = {2019},
}