Field dependence and driver visual search behavior - PowerPoint PPT Presentation

Loading...

PPT – Field dependence and driver visual search behavior PowerPoint presentation | free to view - id: 7a4e9a-NzQwO



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

Field dependence and driver visual search behavior

Description:

Field dependence and driver visual search behavior Professor: Liu Student: Ruby – PowerPoint PPT presentation

Number of Views:23
Avg rating:3.0/5.0
Slides: 18
Provided by: edut1550
Category:

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: Field dependence and driver visual search behavior


1
Field dependence and driver visual search behavior
  • Professor Liu
  • Student Ruby

2
Objective
  • To investigate the field dependence driver
    visual search behavior on different road and time
    of day.

3
References
  • Goodenough, 1976
  • Field dependence drivers were related to
    accidents.
  • Field independence drivers may avoid accidents.

4
References
  • Kaluger and Smith, 1970 Mourant and Rockwell,
    1972 Zell, 1969
  • This is an relationship between eye movement and
    the driver performance which were field
    dependence/ independence.

5
Experiment 1 eye movements in curve negotiation
  • Purpose
  • To identify the perceptual search method involved
    in curve through and try to get the curves
    accident rate.
  • Hypothesis
  • The field dependent drivers have the less
    efficient, and the visual search may be focused
    on less informative information.

6
Experiment 1 eye movements in curve negotiation
  • Participants
  • 5 students. (3 male and 2 female)
  • Equipment
  • Eye tracking and experimental vehicle.
  • Procedure
  • Two lane highways in the country view.
  • 22 curved road and two straight road.
  • Keep an mean speed on 96 km/h.

7
Results and discussion
  • The embedded figure test
  • Two females got 15 s and 22s
  • Three males got 27 s, 40 s, and 50 s.
  • Two females and one male can be considered field
    independent.

8
Results and discussion
9
Results and discussion
  • The EFT scores and the mean to peak power ration
    was 0.99.
  • The more field dependence drivers were more
    focused in a small part on the visual field.
  • The EFT scores and the median frequency was
    -0.91.
  • The field dependence drivers had the slow visual
    search which they need more time to search the
    traffic environment.

10
Results and discussion
  • The field dependence drivers may have a slight
    tunnel vision or the peripheral vision
    capabilities may decrease.
  • The field dependence drivers were hard to pass
    the curve road which because their perceptual
    load is increased.

11
Experiment 2 age related changes in drivers
spare visual capacity
  • Purpose
  • To identify the age related participants
    information processing and the visual search
    behavior.

12
Experiment 2 age related changes in drivers
spare visual capacity
  • Participants
  • 6 younger people (ages 20-25)
  • 9 older people (ages 63-70)
  • Equipments
  • The same equipments as in experiment 1.

13
Experiment 2 age related changes in drivers
spare visual capacity
  • Six information processing tests
  • Embedded figure test
  • Choice reaction time test
  • Visual search test
  • A sequential choice reaction test
  • A memory test
  • A movement-time test
  • Four driving tasks
  • Driving at normal speed in the clear traffic.
  • (daytime and nighttime)
  • Car following at 80km/h.
  • (daytime and nighttime)

14
Results and discussion
  • In the information processing test, only EFT and
    the visual search test were significant (r
    0.56) and related with driving visual search.
  • EFT
  • The young drivers were field independent drivers,
    they took 0.2 min finished the test.
  • The older drivers were field dependence drivers,
    they took 1.3 min finished the test.

15
Results and discussion
  • Mean visual search time
  • Younger drivers were 3.2 s.
  • Older drivers were 2.3 s.
  • Mean eyes open time
  • Younger drivers were 0.7 s.
  • Older drivers were 1.5 s.

16
Results and discussion
  • When driver had longer meant time, they have to
    keep his eye open on the road.
  • The longer time to locate the simple figure from
    the complex figure in EFT.

17
Conclusions
  • The field dependence drivers took long time to
    get relevant information and they were hard to
    shift their attention to another place.
  • The field dependence drivers were hard to get the
    important information from the road environment
    and they may have an higher accident.
About PowerShow.com