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Detection and identification of information presented peripherally inside the car: effects of driving task demands, stimulus position and direction of motion of the stimulus
Swedish National Road and Transport Research Institute.
Swedish National Road and Transport Research Institute.
Swedish National Road and Transport Research Institute.
2000 (English)Report (Other academic)Alternative title
Inhämtande av rörlig visuell information presenterad perifert i bilen : effekter på uppmärksamhetsfördelning och körprestation i varierad trafikmiljö (Swedish)
Abstract [en]

The aim was to study the performance of an in-car information system relying exclusively on information presented peripherally by “running light” stimuli. The information was presented on displays placed in four different positions; upper, lower, to the right, and to the left. Four different directions of the “running light” were used; upwards, downwards, to the right, and to the left. Two levels regarding driving task demands were used.

Thirty-two subjects participated in the study. A repeated-measures design was used. The study was performed in an advanced driving simulator. The subjects’ task was to report the direction of motion of the peripheral stimuli as quickly as possible.

A traffic situation with high demands on the driver caused the subjects to fixate the peripheral stimulus to a lesser extent than when the driving task was less demanding. The upper display was fixated to a smaller extent than the left or the right one. However, differences in number of fixations between the displays appeared only when the demands of the driving task were high, not when they were low. No effects of the direction of motion of the stimulus on the number of fixations appeared.

There were very few errors regarding the identification of the direction of the stimulus, regardless of whether the stimulus was fixated or not.

The response times were short. There were differences between display positions. The response time was shortest for the right display and for the lower display, but somewhat longer for the other two displays. It was somewhat shorter when the stimulus was fixated than when it was not. Driving task demands had no effect on response time. Regarding effects of the direction of motion of the stimulus, there was only a very weak interaction with driving task demands and display position.

Abstract [sv]

Syftet var att studera funktionen hos ett informationssystem som enbart använder sig av visuell information, presenterad perifert i synfältet med hjälp av ”rinnande ljus” i bilen. Informationen presenterades på displayer i fyra olika positioner; upptill, nedtill, till höger och till vänster. Fyra olika riktningar hos det “rinnande ljuset” användes; uppåt, nedåt, åt höger, och åt vänster. Två nivåer beträffande kravet hos köruppgiften användes.

Trettiotvå försökspersoner deltog i studien. Designen var upprepad mätning. Studien genomfördes med hjälp av en avancerad körsimulator. Försökspersonernas uppgift var att så snabbt som möjligt rapportera rörelseriktningen hos de perifera stimuli som presenterades.

En krävande köruppgift fick försökspersonerna att fixera perifert stimulus i mindre utsträckning än då köruppgiften var mindre krävande. Den övre displayen fixerades i mindre utsträckning än den vänstra och högra. Skillnader mellan displayer beträffande antal fixationer förelåg dock endast för den krävande köruppgiften, ej vid den mindre krävande. Däremot erhölls ingen effekt av stimulus’ rörelseriktning på antalet fixationer.

Mycket få fel registrerades beträffande identifieringen av stimulus’ rörelseriktning oavsett om stimulus fixerades eller ej.

Svarstiderna var genomgående korta. Det förelåg en skillnad mellan displaypositioner. Svarstiden var kortast för den högra och för den nedre displayen, men något längre för den övre och den vänstra displayen. Den var något längre då stimulus fixerades än när detta ej var fallet. Ingen effekt av de skilda kraven hos köruppgiften förelåg beträffande svarstider. Vad gäller effekter av stimulus’ rörelseriktning förelåg endast en mycket svag interaktion med köruppgiftens krav och displayposition.

Place, publisher, year, edition, pages
Linköping: Statens väg- och transportforskningsinstitut , 2000. , p. 28
Series
VTI rapport, ISSN 0347-6030 ; 461A
Keyword [en]
English, Sweden, Driver information, In vehicle information, Peripheral vision, Detection, Attention, Direction, Stimulus, Visual display, Driving simulator
Research subject
90 Road: Vehicles and vehicle technology, 914 Road: ITS och vehicle technology; 80 Road: Traffic safety and accidents, 841 Road: Road user behaviour
Identifiers
URN: urn:nbn:se:vti:diva-1756OAI: oai:DiVA.org:vti-1756DiVA, id: diva2:670545
Available from: 2013-12-03 Created: 2013-12-03 Last updated: 2017-02-09Bibliographically approved

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