Comparing the Effectiveness of GPS-Enhanced Voice Guidance for Pedestrians with Metric- and Landmark-Based Instruction Sets

Rehrl, Karl; Häusler, Elisabeth; Leitinger, Sven

doi:10.1007/978-3-642-15300-6_14

Cited by 31 publications

(22 citation statements)

References 22 publications

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“…For our experiment, we selected a city center outdoor environment. Environments for this type of experiment are usually real environments [26,4] rather than artificial (lab) environments, though exceptions are possible [28]. The location of the route was in a quiet area in the city center of Prague, Czech Republic (see Fig.…”

Section: Methodsmentioning

confidence: 99%

“…A study conducted by Ross et al [27] states that the inclusion of landmarks within the pedestrian navigation instructions in-creased user confidence, and reduced or eliminated navigation errors. Rehrl et al [26] showed that voice-only guidance in an unfamiliar environment is feasible, and that participants clearly preferred landmark-enhanced instructions.…”

Section: Pedestrian Navigationmentioning

confidence: 99%

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Navigation Problems in Blind-to-Blind Pedestrians Tele-assistance Navigation

Balata

Mikovec

Maly

2015

Human-Computer Interaction – INTERACT 2015

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Abstract. We raise a question whether it is possible to build a large-scale navigation system for blind pedestrians where a blind person navigates another blind person remotely by mobile phone. We have conducted an experiment, in which we observed blind people navigating each other in a city center in 19 sessions. We focused on problems in the navigator's attempts to direct the traveler to the destination. We observed 96 problems in total, classified them on the basis of the type of navigator or traveler activity and according to the location in which the problem occurred. Most of the problems occurred during the activities performed by the navigator. We extracted a set of guidelines based on analysis of navigation problems and successful navigation strategies. We have partially mapped the problem of tele-assistance navigation to POMDP based dialogue system.

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Section: Methodsmentioning

confidence: 99%

Section: Pedestrian Navigationmentioning

confidence: 99%

Navigation Problems in Blind-to-Blind Pedestrians Tele-assistance Navigation

Balata

Mikovec

Maly

2015

Human-Computer Interaction – INTERACT 2015

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“…These include linguistic (text and verbal), map, sketch, tactile and augmented-reality representations [31,41]. Due to their ubiquity, linguistic representations are by far the most commonly studied.…”

Section: Route Descriptions -Information and Representationmentioning

confidence: 99%

Interactive cartographic route descriptions

2013

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Providing an adequate route description requires in-depth spatial knowledge of the route in question. In this article we demonstrate that despite having travelled a route recently and having much experience of the area in question, an individual may lack such a degree of knowledge. Previous research and experience informs us that a map is an effective tool for bridging gaps in one's spatial knowledge. In this article we propose an approach, known as an Interactive Route Description, for defining and interpreting route descriptions interactively with a map. This approach is based on the concept of annotating the map in question and allows the aforementioned gap in one's spatial knowledge to be bridged. An additional benefit of defining route descriptions in this way is that it facilitates automatic parsing and in turn offers many potential applications. One such application, illustrated in this paper, is the automatic transformation to other representations of the description such as turn-by-turn instructions.

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“…e.g. Rehrl, Häusler, & Leitinger, 2010). Severe confusion will likely result: It is hard to make sense of instructions S 2 and S 3 due to the vagueness of the expression "stay in the square".…”

Section: Introductionmentioning

confidence: 99%

Empirically measuring salience of objects for use in pedestrian navigation

Kattenbeck

2015

Proceedings of the 23rd SIGSPATIAL International Conference on Advances in Geographic Information Systems

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Auch wenn sie es vehement von sich weisen würden, so haben meine Eltern großen Anteil an dieser, meiner Dissertation. Sie gaben mir von Kindesbeinen an die Freiheit, mich mit dem Nachdenken auseinanderzusetzen. Glaubt mir, Mama und Papa, ohne diese Freiheit wäre ich heute nicht der, der ich bin.Schließlich danke ich meiner über alles geliebten Frau Anita. Wir sind fast genau so lange verheiratet, wie es gedauert hat, bis ich nun mein Promotionsverfahren erfolgreich abschließen konnte. In diesen Jahren haben wir einiges zusammen erlebt und durchgemacht.Du, Anita, hast immer zu mir gehalten und mich in Allem und mit Allem unterstützt.Ohne Dich, Anita, wäre diese Arbeit undenkbar.Dir, Anita, widme ich diese Arbeit.vi A B S T R A C T background Humans usually refer to landmarks when they give route directions to pedestrians. One of the reasons why current mobile pedestrian navigation systems do not yet mimic this mode of communication is the lack of available data sources. The usefulness of a crowd-sourced data acquisition approach to overcome this problem has long been mooted. However, to date no empirically sound way of measuring the salience of objects by means of surveys exists.goal Given this background, this doctoral work has three goals:1. To achieve a sound way of measuring salience and its subdimensions, i.e. visibility in advance, cognitive salience, prototypicality, structural salience, and visual salience based on taking dimensions revealed in earlier studies systematically and simultaneously into account.2. To find subgroups of visual features among the large number of visual attributes known from the literature.3. To find the most important subdimensions of salience by means of estimating two different structural equation models. Model I is based on assumptions of independence among subdimensions, whereas model II reflects hypotheses of mediation.Taken as a whole, achieving these goals will foster both, the advancement of theories of salience and landmark acquisition methods.methodology A large scale, in-situ experiment was implemented, trying to overcome weaknesses of earlier attempts made to estimate salience. An vii appropriate sample size of buildings and non-buildings was calculated a priori (n obj = 360). Objects were randomly selected based on their geographical coordinates and randomly grouped into n r = 55 routes. Participants were required to rate objects by means of a survey. The questions were derived from empirical evidence found in earlier studies. Each route was walked by two different participants (n = 112), id est (i.e.) two ratings per object were collected for data analysis.findings Model I and model II were analyzed using PLS Path Modeling and consistent PLS Path Modeling, respectively. The measurement models proposed showed a good fit, although some weaknesses were identified for prototypicality and cognitive salience. Geometrical aspects as well as features like (visual) age turned out to have a stronger impact on visual salience than color. Model I did not yield reasonable struct...

show abstract

Comparing the Effectiveness of GPS-Enhanced Voice Guidance for Pedestrians with Metric- and Landmark-Based Instruction Sets

Cited by 31 publications

References 22 publications

Navigation Problems in Blind-to-Blind Pedestrians Tele-assistance Navigation

Navigation Problems in Blind-to-Blind Pedestrians Tele-assistance Navigation

Interactive cartographic route descriptions

Empirically measuring salience of objects for use in pedestrian navigation

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