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Publications (10 of 44) Show all publications
Lohilahti Bladfält, S., Grane, C. & Bengtsson, P. (2019). Gear Shifter Design: Lack of Dedicated Positions and the Contribution to Cognitive Load and Inattention. In: : . Paper presented at AHFE International Conference on Human Factors in Transportation, 2019; Washington D.C.; United States; 24-28 July 2019.
Open this publication in new window or tab >>Gear Shifter Design: Lack of Dedicated Positions and the Contribution to Cognitive Load and Inattention
2019 (English)Conference paper (Refereed)
Identifiers
urn:nbn:se:ltu:diva-75201 (URN)10.1007/978-3-030-20503-4_44 (DOI)
Conference
AHFE International Conference on Human Factors in Transportation, 2019; Washington D.C.; United States; 24-28 July 2019
Available from: 2019-07-03 Created: 2019-07-03 Last updated: 2019-07-03
Broström, R., Bengtsson, P. & Aust, M. L. (2016). Individual glance strategies and their effect on the NHTSA visual manual distraction test (ed.). Paper presented at . Transportation Research Part F: Traffic Psychology and Behaviour, 36, 83-91
Open this publication in new window or tab >>Individual glance strategies and their effect on the NHTSA visual manual distraction test
2016 (English)In: Transportation Research Part F: Traffic Psychology and Behaviour, ISSN 1369-8478, E-ISSN 1873-5517, Vol. 36, p. 83-91Article in journal (Refereed) Published
Abstract [en]

The purpose of this paper was to investigate how individual differences in glance strategy could impact the glance performance test defined in the NHTSA visual manual distraction guidelines. Better understanding of the test procedure could help development of new technology for safe driving. A custom in-vehicle information system was developed and assessed in a driving simulator by eighteen participants. The interfaces were designed according to recommendations in the NHTSA guidelines and contained manual radio-tuning tasks, sound settings tasks and six letter spelling tasks. Two of the six tested interfaces fully complied with the test. In addition, clear individual differences in glance strategy were found among the participants. Four individual glance strategies were identified. Two of these, long glancers and frequent glancers, highly affected the outcome of the compliance test. Participants belonging to the long glancers and the frequent glancers categories were identified as statistical outliers in many test cases. For example, if the individual values of these participants were replaced with sample mean, the number of complying interfaces would increase to five out of six, which is more in line with expectations for these interfaces. The results of this study show that individual variations in glance strategy exist. Also, these individual variations seem to have a non- negligible influence on the result when performance-testing of in-vehicle interfaces is done according to the NTHSA guidelines.

National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Engineering Psychology
Identifiers
urn:nbn:se:ltu:diva-4668 (URN)10.1016/j.trf.2015.10.017 (DOI)000368204900009 ()2-s2.0-84952328991 (Scopus ID)2a61e72d-45c5-47ec-9a50-f81d8d3c229a (Local ID)2a61e72d-45c5-47ec-9a50-f81d8d3c229a (Archive number)2a61e72d-45c5-47ec-9a50-f81d8d3c229a (OAI)
Note
Validerad; 2016; Nivå 2; 20151223 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Grane, C. & Bengtsson, P. (2013). Driving performance during visual and haptic menu selection with in-vehicle rotary device (ed.). Paper presented at . Transportation Research Part F: Traffic Psychology and Behaviour, 18, 123-135
Open this publication in new window or tab >>Driving performance during visual and haptic menu selection with in-vehicle rotary device
2013 (English)In: Transportation Research Part F: Traffic Psychology and Behaviour, ISSN 1369-8478, E-ISSN 1873-5517, Vol. 18, p. 123-135Article in journal (Refereed) Published
Abstract [en]

An in-vehicle haptic rotary device developed to interact with secondary tasks can provide haptic support to a visual interface and reduce the need to look away from the road. However, added haptic information intended to support interaction may distract the driver by adding cognitive load. This study examines how visual and haptic interfaces affect driver performance and if visual–haptic information could reduce effects of driver distraction. Four menu selection interfaces were compared: visual-only, visual–haptic with partly haptic support, visual–haptic with full haptic support, and haptic-only. The Lane Change Test was used with four measures. Interaction with the interfaces while driving caused increased driving deviation and delayed lane change initiation. The visual-only and the visual–haptic interface with partly haptic support caused erroneous crossed lanes. The haptic-only interface caused missed road signs. Full haptic support had the least negative effect on driver performance. In conclusion, haptic support could reduce effects of visual load without adding effects of cognitive load.

National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Engineering Psychology
Identifiers
urn:nbn:se:ltu:diva-7705 (URN)10.1016/j.trf.2012.12.011 (DOI)000318322900011 ()2-s2.0-84873624955 (Scopus ID)61e7477b-d97b-4110-8946-617982950754 (Local ID)61e7477b-d97b-4110-8946-617982950754 (Archive number)61e7477b-d97b-4110-8946-617982950754 (OAI)
Projects
EFESOS - Environmental Friendly efficient Enjoyable and Safety Optimized Systems
Note
Validerad; 2013; 20130212 (camgra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Rydström, A., Broström, R. & Bengtsson, P. (2012). A comparison of two contemporary types of in-car multifunctional interfaces (ed.). Applied Ergonomics, 43(3), 507-514
Open this publication in new window or tab >>A comparison of two contemporary types of in-car multifunctional interfaces
2012 (English)In: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 43, no 3, p. 507-514Article in journal (Refereed) Published
Abstract [en]

A driving simulator study was conducted to investigate the effects of carrying out a variety of tasks using two different types of contemporary in-car multifunctional interfaces: a touch screen interface and an interface manoeuvred by a rotary control. Participants drove on a curved rural road while performing tasks such as list scrolling, radio tuning, alphanumeric input and continuous adjustments. The results indicate that, in terms of task completion time and the number of glances made to the display, the optimal interface is dependent on the task being performed. The touch screen interface was better for alphanumeric input tasks and the interface manoeuvred by a rotary control was better for continuous adjustments and list scrolling. Alphanumeric input seems to be more demanding than other tasks, independent of the interface used. It was apparent in this simulator study that both interfaces affected the lateral control performance, but lateral control performance deteriorated to a greater extent when the touch screen interface was used, probably partially as a result of the lower display position.

National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Engineering Psychology
Identifiers
urn:nbn:se:ltu:diva-14291 (URN)10.1016/j.apergo.2011.08.004 (DOI)000300131100008 ()21924702 (PubMedID)2-s2.0-84855890646 (Scopus ID)da503666-ed90-4e2a-8a6a-7c3309eb70d1 (Local ID)da503666-ed90-4e2a-8a6a-7c3309eb70d1 (Archive number)da503666-ed90-4e2a-8a6a-7c3309eb70d1 (OAI)
Projects
EFESOS - Environmental Friendly efficient Enjoyable and Safety Optimized Systems
Note

Validerad; 2012; 20110926 (ysko)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Grane, C. & Bengtsson, P. (2012). Haptic addition to a visual menu selection interface controlled by an in-vehicle rotary device (ed.). Advances in Human-Computer Interaction, 2012, Article ID 787469.
Open this publication in new window or tab >>Haptic addition to a visual menu selection interface controlled by an in-vehicle rotary device
2012 (English)In: Advances in Human-Computer Interaction, ISSN 1687-5893, E-ISSN 1687-5907, Vol. 2012, article id 787469Article in journal (Refereed) Published
Abstract [en]

Today, several vehicles are equipped with a visual display combined with a haptic rotary device for handling in-vehicle information system tasks while driving. This experimental study investigates whether a haptic addition to a visual interface interferes with or supports secondary task performance and whether haptic information could be used without taking eyes off road. Four interfaces were compared during simulated driving: visual only, partly corresponding visual-haptic, fully corresponding visual-haptic, and haptic only. Secondary task performance and subjective mental workload were measured. Additionally, the participants were interviewed. It was found that some haptic support improved performance. However, when more haptic information was used, the results diverged in terms of task completion time and interface comprehension. Some participants did not sense all haptics provided, some did not comprehend the correspondence between the haptic and visual interfaces, and some did. Interestingly, the participants managed to complete the tasks when using haptic-only information.

National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Engineering Psychology
Identifiers
urn:nbn:se:ltu:diva-6839 (URN)10.1155/2012/787469 (DOI)2-s2.0-84858197465 (Scopus ID)523fe46e-0891-4a2a-9df7-596455843814 (Local ID)523fe46e-0891-4a2a-9df7-596455843814 (Archive number)523fe46e-0891-4a2a-9df7-596455843814 (OAI)
Note

Validerad; 2012; 20120302 (camgra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Broström, R., Bengtsson, P. & Axelsson, J. (2011). Correlation between safety assessments in the driver-car interaction design process (ed.). Applied Ergonomics, 42(4), 575-582
Open this publication in new window or tab >>Correlation between safety assessments in the driver-car interaction design process
2011 (English)In: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 42, no 4, p. 575-582Article in journal (Refereed) Published
Abstract [en]

With the functional revolution in modern cars, evaluation methods to be used in all phases of driver-car interaction design have gained importance. It is crucial for car manufacturers to discover and solve safety issues early in the interaction design process. A current problem is thus to find a correlation between the formative methods that are used during development and the summative methods that are used when the product has reached the customer. This paper investigates the correlation between efficiency metrics from summative and formative evaluations, where the results of two studies on sound and navigation system tasks are compared. The first, an analysis of the J.D. Power and Associates APEAL survey, consists of answers given by about two thousand customers. The second, an expert evaluation study, was done by six evaluators who assessed the layouts by task completion time, TLX and Nielsen heuristics. The results show a high degree of correlation between the studies in terms of task efficiency, i.e. between customer ratings and task completion time, and customer ratings and TLX. However, no correlation was observed between Nielsen heuristics and customer ratings, task completion time or TLX. The results of the studies introduce a possibility to develop a usability evaluation framework that includes both formative and summative approaches, as the results show a high degree of consistency between the different methodologies. Hence, combining a quantitative approach with the expert evaluation method, such as task completion time, should be more useful for driver-car interaction design.

National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Engineering Psychology
Identifiers
urn:nbn:se:ltu:diva-6577 (URN)10.1016/j.apergo.2010.06.019 (DOI)000288147900007 ()2-s2.0-79551604057 (Scopus ID)4d276730-edac-11df-8b36-000ea68e967b (Local ID)4d276730-edac-11df-8b36-000ea68e967b (Archive number)4d276730-edac-11df-8b36-000ea68e967b (OAI)
Projects
EFESOS - Environmental Friendly efficient Enjoyable and Safety Optimized Systems
Note

Validerad; 2011; 20101111 (ysko)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Rydström, A., Broström, R. & Bengtsson, P. (2009). Can haptics facilitate the interaction with an in-vehicle multifunctional interface? (ed.). IEEE Transactions on Haptics, 2(3), 141-147
Open this publication in new window or tab >>Can haptics facilitate the interaction with an in-vehicle multifunctional interface?
2009 (English)In: IEEE Transactions on Haptics, ISSN 1939-1412, E-ISSN 2329-4051, Vol. 2, no 3, p. 141-147Article in journal (Refereed) Published
Abstract [en]

A driving simulator study was conducted to investigate whether the interaction with an in-vehicle multifunctional interface maneuvered by a rotary control can be improved if assisting haptics is provided. Two conditions were compared in the study, one in which neutral haptics was provided through the rotary control and one in which enhanced haptics was provided. Participants drove on a curved rural road while performing tasks such as list scrolling, radio tuning and text entry. The results indicated that, for radio tuning and settings adjustments tasks, interaction is improved when enhanced haptics is provided. It was shown that enhanced haptics can increase performance in terms of task completion time and can reduce the number and duration of glances made to the display. However, for alphanumeric input tasks, improvements are needed. Enhanced haptics seems to facilitate interaction with functions in which the sensations can be incorporated in an intuitive way.

Keywords
Manufacturing engineering and work sciences - Work sciences and ergonomics, Produktion och arbetsvetenskap - Arbetsvetenskap och ergonomi
National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Engineering Psychology
Identifiers
urn:nbn:se:ltu:diva-5909 (URN)10.1109/TOH.2009.21 (DOI)000207898300004 ()2-s2.0-70349175571 (Scopus ID)4192f670-6089-11de-9f57-000ea68e967b (Local ID)4192f670-6089-11de-9f57-000ea68e967b (Archive number)4192f670-6089-11de-9f57-000ea68e967b (OAI)
Note

Validerad; 2009; 20090624 (ysko)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Rydström, A., Grane, C. & Bengtsson, P. (2009). Driver behaviour during haptic and visual secondary tasks (ed.). In: (Ed.), 1st International Conference on Automotive User Interfaces and Interactive Vehicular Applications 2009: (AutomotiveUI 2009) ; Essen, Germany, 21 - 22 September 2009 ; [proceedings]. Paper presented at International Conference on Automotive User Interfaces and Interactive Vehicular Applications : 21/09/2009 - 22/09/2009 (pp. 121-127). Red Hook, NY: Curran Associates, Inc.
Open this publication in new window or tab >>Driver behaviour during haptic and visual secondary tasks
2009 (English)In: 1st International Conference on Automotive User Interfaces and Interactive Vehicular Applications 2009: (AutomotiveUI 2009) ; Essen, Germany, 21 - 22 September 2009 ; [proceedings], Red Hook, NY: Curran Associates, Inc., 2009, p. 121-127Conference paper, Published paper (Refereed)
Abstract [en]

There has been an increasing interest for in-vehicle interfaces that make use of haptic information. A simulator study was conducted to investigate whether haptic information can facilitate the interaction with an interface while driving. The conceptual in-car interface consisted of a visual menu of four textures displayed on a screen and corresponding haptic information displayed through the interaction device - a rotary device. The experimental conditions included either visual or haptic or both visual and haptic information. One advantage of the condition including only haptic information was that the participants' eyes remained on the road during the interaction. However, since the haptic interaction necessitated serial processing, the experimental task took longer when using only haptic information. Therefore the participants seem to have relied more on the visual information when it was available. The degradation in driving performance and mental workload assessment did not differ between the conditions.

Place, publisher, year, edition, pages
Red Hook, NY: Curran Associates, Inc., 2009
National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Engineering Psychology
Identifiers
urn:nbn:se:ltu:diva-32378 (URN)10.1145/1620509.1620533 (DOI)70350662572 (Scopus ID)6df13ce0-d816-11de-bae5-000ea68e967b (Local ID)978-1-60558-571-0 (ISBN)6df13ce0-d816-11de-bae5-000ea68e967b (Archive number)6df13ce0-d816-11de-bae5-000ea68e967b (OAI)
Conference
International Conference on Automotive User Interfaces and Interactive Vehicular Applications : 21/09/2009 - 22/09/2009
Projects
OPTIVe - Optimised system integration for safe interaction in vehicles
Note

Godkänd; 2009; 20091123 (ysko)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-05-21Bibliographically approved
Berglund, H., Grane, C. & Bengtsson, P. (2008). Do ridge sizes in a rotary device for menu selection influence driving performance? (ed.). In: (Ed.), Waldemar Karwowski; Gavriel Salvendy (Ed.), 2008 AHFE International Conference: 2nd International Conference on Applied Human Factors and Ergonomics. Paper presented at International Conference on Applied Human Factors and Ergonomics : 14/07/2008 - 17/07/2008. Louisville, KY: USA Publishing
Open this publication in new window or tab >>Do ridge sizes in a rotary device for menu selection influence driving performance?
2008 (English)In: 2008 AHFE International Conference: 2nd International Conference on Applied Human Factors and Ergonomics / [ed] Waldemar Karwowski; Gavriel Salvendy, Louisville, KY: USA Publishing , 2008Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Louisville, KY: USA Publishing, 2008
National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Engineering Psychology
Identifiers
urn:nbn:se:ltu:diva-35734 (URN)a6468350-52ed-11df-a0f4-000ea68e967b (Local ID)978-1-60643-712-4 (ISBN)a6468350-52ed-11df-a0f4-000ea68e967b (Archive number)a6468350-52ed-11df-a0f4-000ea68e967b (OAI)
Conference
International Conference on Applied Human Factors and Ergonomics : 14/07/2008 - 17/07/2008
Projects
OPTIVe - Optimised system integration for safe interaction in vehicles
Note

Godkänd; 2008; 20100428 (pebn)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-05-21Bibliographically approved
Grane, C. & Bengtsson, P. (2008). Serial or parallel search with a multi-modal rotary device for in-vehicle use (ed.). In: (Ed.), Waldemar Karwowski; Gavriel Salvendy (Ed.), 2008 AHFE International Conference: 2nd International Conference on Applied Human Factors and Ergonomics. Paper presented at International Conference on Applied Human Factors and Ergonomics : 14/07/2008 - 17/07/2008. Louisville, KY: USA Publishing
Open this publication in new window or tab >>Serial or parallel search with a multi-modal rotary device for in-vehicle use
2008 (English)In: 2008 AHFE International Conference: 2nd International Conference on Applied Human Factors and Ergonomics / [ed] Waldemar Karwowski; Gavriel Salvendy, Louisville, KY: USA Publishing , 2008Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Louisville, KY: USA Publishing, 2008
National Category
Production Engineering, Human Work Science and Ergonomics
Research subject
Engineering Psychology
Identifiers
urn:nbn:se:ltu:diva-28095 (URN)1bffa920-52f1-11df-a0f4-000ea68e967b (Local ID)978-1-60643-712-4 (ISBN)1bffa920-52f1-11df-a0f4-000ea68e967b (Archive number)1bffa920-52f1-11df-a0f4-000ea68e967b (OAI)
Conference
International Conference on Applied Human Factors and Ergonomics : 14/07/2008 - 17/07/2008
Projects
OPTIVe - Optimised system integration for safe interaction in vehicles
Note

Godkänd; 2008; 20100428 (pebn)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-05-21Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-9272-1520

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