On the Nature and Evaluation of Fidelity in Virtual Environments

Stoffregen, Tom; Bardy, Benoît G.; Smart, Laura; Pagulayan, Randy J.

doi:10.1201/9781410608888.ch6

Cited by 112 publications

(113 citation statements)

References 27 publications

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“…It has been showed that the interactive modality of the road-crossing situation improves the perception of crossing possibilities in comparison with button-press or verbal responses (e.g., Lobjois & Cavallo, 2009 ;te Velde et al, 2005). Such interactive design provides a better possibility to couple perception and action and increases the ecological validity of the task (Burkhardt et al, 2003;Morice et al, 2008 ;Stoffregen et al, 2003). Moreover the walk-across-the-road task allows to investigate whether pedestrians adjust their crossing behavior to the traffic conditions, and to study crossing strategies, such as early initiation, modulation of the walking speed and anticipation in crossing by moving forward on the road in order to shorten the crossing M a n u s c r i p t 8 distance.…”

Section: Methodsmentioning

confidence: 99%

“…Stoffregen et al (2003) argued "that in the strict sense of duplication, simulation is essentially impossible" as "sensory stimulation in a simulator cannot be identical to sensory stimulation that is available in the system being simulated" (p. 111). Simulation cannot capture all of the conditions, information, sensations, and factors associated with crossing decisions.…”

Section: Decisionsmentioning

confidence: 99%

“…For these reasons, we have to acknowledge that our VR tool has a limited physical validity. The question that arises is whether a limited physical validity jeopardizes the "psychological validity" (Pinto et al, 2008) or "action fidelity" (Burkhardt et al, 2003;Stoffregen et al, 2003). First, Pinto et al M a n u s c r i p t 21 (2008) suggested that a high level of physical fidelity is not always required to achieve good levels of psychological validity.…”

Section: Decisionsmentioning

confidence: 99%

See 2 more Smart Citations

The effects of age and traffic density on street-crossing behavior

Lobjois¹,

Benguigui

Cavallo³

2013

Accident Analysis & Prevention

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Please cite this article as: Lobjois, R., Benguigui, N., Cavallo, V., The effects of age and traffic density on street-crossing behavior, Accident Analysis and Prevention (2010), doi:10.1016/j.aap.2012 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. A c c e p t e d M a n u s c r i p t AbstractPast research has shown that road users accept shorter time gaps when the waiting time/number of vehicles they let pass before attempting to merge into the traffic increases.While elderly pedestrians are known to be an extremely vulnerable group of road users, very few studies dealt with the effect of environmental constraints and crossing complexity on this population's safety. The present study aimed at determining whether or not street-crossing decisions and behavior of younger and older pedestrians were differently affected by a traffic flow. In an interactive street-crossing task, we assessed whether mean time gap and crossing decisions depended on the position of the gap pedestrians selected into the traffic stream.Results revealed that irrespective of their age pedestrians accepted a smaller time gap when they chose the second interval of the traffic compared to the first one. Contrasting with previous hypotheses, this traffic-related behavior was not accompanied by an increase in the decisions risk. The findings also showed that the transition threshold from rejecting to accepting time gaps was shorter when the second interval was selected compared to the first one. This increment in task constraints might help younger and older pedestrians alike to perceive action possibilities more accurately and to be better attuned to traffic conditions by comparing gaps between each other. This opens an interesting perspective in the understanding and the training of the ability of elderly road users to remain accurate in their judgements.

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Section: Methodsmentioning

confidence: 99%

Section: Decisionsmentioning

confidence: 99%

Section: Decisionsmentioning

confidence: 99%

See 1 more Smart Citation

The effects of age and traffic density on street-crossing behavior

Lobjois¹,

Benguigui

Cavallo³

2013

Accident Analysis & Prevention

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“…By enabling users "to perceive in order to act, but also to act in order to perceive", the task and the cues represented in the experiment allowed action fidelity (Stoffregen et al, 2003); that is, behaviors in an experimental context that reproduce those in the intended environment.…”

Section: Guideline 3: Identify Cues To Be Represented In Experimentsmentioning

confidence: 99%

“…If they do not use EV to do so, the organism's experimental behavior may not correspond to the functional behavior toward which the researcher wishes to generalize. In their study of the relationship between simulators and simulated systems, Stoffregen, Bardy, Smart, and Pagulayan (2003) refer to this reproduction of behavior as "action fidelity". Action fidelity is what neo-Brunswikians name "task representativeness" (Dhami et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

ECOVAL: Ecological Validity of Cues and Representative Design in User Experience Evaluations

Kieffer¹

2017

THCI

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Abstract:Egon Brunswik coined and defined the concepts of ecological validity and representative design, which are both essential to achieve external validity. However, research in HCI has inconsistently and incorrectly used Brunswik's concept of ecological validity, which prevents the field from developing cumulative science and from generalizing the findings of user experience (UX) evaluations. In this paper, I present ECOVAL, a framework I built on Brunswik's ideas. On the one hand, ECOVAL helps HCI researchers describe and assess the ecological validity of cues in UX evaluations. On the other hand, ECOVAL guidelines-formulated as a step-by-step procedure-help HCI researchers achieve representative design and, therefore, increase external validity. An industrial case study demonstrates the relevance of ECOVAL for achieving representative design while conducting formative UX testing. In discussing the case study, I describe how ECOVAL can help HCI researchers assess and increase the validity of UX experiments and generalize UX findings. I also illustrate the trade-offs between internal and external validities and UX resources that inevitably arise when one conducts UX experiments. From the results, I sketch avenues for future research and discuss the related challenges that future work should address.

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Judicious Use of Simulation Technology in Continuing Medical Education

Curtis

DiazGranados

Feldman

2012

Journal of Continuing Education in the Health Professions

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Use of simulation-based training is fast becoming a vital source of experiential learning in medical education. Although simulation is a common tool for undergraduate and graduate medical education curricula, the utilization of simulation in continuing medical education (CME) is still an area of growth. As more CME programs turn to simulation to address their training needs, it is important to highlight concepts of simulation technology that can help to optimize learning outcomes. This article discusses the role of fidelity in medical simulation. It provides support from a cross section of simulation training domains for determining the appropriate levels of fidelity, and it offers guidelines for creating an optimal balance of skill practice and realism for efficient training outcomes. After defining fidelity, 3 dimensions of fidelity, drawn from the human factors literature, are discussed in terms of their relevance to medical simulation. From this, research-based guidelines are provided to inform CME providers regarding the use of simulation in CME training.

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On the Nature and Evaluation of Fidelity in Virtual Environments

Cited by 112 publications

References 27 publications

The effects of age and traffic density on street-crossing behavior

The effects of age and traffic density on street-crossing behavior

ECOVAL: Ecological Validity of Cues and Representative Design in User Experience Evaluations

Judicious Use of Simulation Technology in Continuing Medical Education

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