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ABSTRACT
Situated public displays and interactive surfaces are becoming
ubiquitous in our daily lives. Issues arise with these
devices when attempting to interact over a distance or with
content that is physically out of reach. In this paper we outline
three techniques that combine gaze with manual handcontrolled
input to move objects. We demonstrate and discuss
how these techniques could be applied to two scenarios
involving, (1) a multi-touch surface and (2) a public display
and a mobile device.
in list: Eye Control
ABSTRACT
Projector phones, handheld game consoles and many other
mobile devices increasingly include more than one display,
and therefore present a new breed of mobile Multi-Display
Environments (MDEs) to users. Existing studies illustrate
the effects of visual separation between displays in MDEs
and suggest interaction techniques that mitigate these
effects. Currently, mobile devices with heterogeneous
displays such as projector phones are often designed
without reference to visual separation issues; therefore it is
critical to establish whether concerns and opportunities
raised in the existing MDE literature apply to the emerging
category of Mobile MDEs (MMDEs). This paper
investigates the effects of visual separation in the context of
MMDEs and contrasts these with fixed MDE results, and
explores design factors for Mobile MDEs. Our study uses a
novel eye-tracking methodology for measuring switches in
visual context between displays and identifies that MMDEs
offer increased design flexibility over traditional MDEs in
terms of visual separation. We discuss these results and
identify several design implications.
in list: HCI & Usability
From the moment infants are born, they seem to prefer orienting to social
stimuli, over objects and non-social stimuli. This preference lasts throughout
adulthood and is believed to play a crucial role in social-communicative
development. By following up a group of infants at the age of 6, 8, and 12
months, this study explored the role of social orienting in the early
development of joint attention skills. The expected association between social
orienting and joint attention was partially confirmed. Social orienting in
real-life photographs of everyday situations was not related to later joint
attention skills, however fixation to the eyes in a neutral face was related to
response to joint attention skills, and fixation to the eyes in a dynamic video
clip of a talking person was predictive of initiating joint attention skills.
Several alternative interpretations of the results are discussed.
in list: Developmental Research
ABSTRACT
We analysed the eye-tracking data of 147 participants as they used a total of 15 separate website navigation menus to complete key activities. The hypotheses for this study were that (a) the psychological phenomenon of the order effect would manifest in that items at either end of a menu would be located more quickly than those in the middle and (b) that the items that were relevant to completing the user‘s tasks would be located more quickly through peripheral visual identification of these items. Although items relevant to the user‘s task were acquired 1.8 seconds faster on average, both of the hypotheses were rejected as no statistically significant patterns were found. It was concluded that each user was likely to have his or her own searching behaviour and this could be affected by other factors such as the graphic design of the menu.
in list: HCI & Usability
ABSTRACT
Growing interest in canine cognition and visual perception has promoted research into the allocation of visual attention during free-viewing tasks in the dog. The techniques currently available to study this (i.e. preferential looking) have, however, lacked spatial accuracy, permitting only gross judgments of the location of the dog's point of gaze and are limited to a laboratory setting. Here we describe a mobile, head-mounted, video-based, eye-tracking system and a procedure for achieving standardized calibration allowing an output with accuracy of 2–3°.
The setup allows free movement of dogs; in addition the procedure does not involve extensive training skills, and is completely non-invasive. This apparatus has the potential to allow the study of gaze patterns in a variety of research applications and could enhance the study of areas such as canine vision, cognition and social interactions.
Link: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T04-51FGSTH-4&_user=10&_coverDate=11%2F11%2F2010&_rdoc=1&_fmt=high&_orig=search&_origin=search&_sort=d&_docanchor=&view=c&_searchStrId=1561365621&_rerunOrigin=scholar.google&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=c2501dc1fba39f0b6e702a0c6210ba65&searchtype=a
ABSTRACT
This study combined an event schema approach with top-down processing perspectives to investigate whether high-functioning children and adults with autism spectrum disorder (ASD) spontaneously attend to and remember context-relevant aspects of scenes. Participants read one story of story-pairs (e.g., burglary or tea party). They then inspected a scene (living room) of which some objects were relevant in that context, irrelevant (related to the non-emphasized event) or neutral (scene-schema related). During immediate and delayed recall, only the (TD) groups selectively recalled context-relevant objects, and significantly more context-relevant objects than the ASD groups. Gaze-tracking suggests that one factor in these memory differences may be diminished top-down effects of event schemas on initial attention (first ten fixations) to relevant items in ASD.
in list: Cognitive & Behavioural Psychology
ABSTRACT
The success of MIS is coupled with an increasing demand on surgeons’ manual dexterity and visuomotor coordination due to the complexity of instrument manipulations. The use of master–slave surgical robots has avoided many of the drawbacks of MIS, but at the same time, has increased the physical separation between the surgeon and the patient. Tissue deformation combined with restricted workspace and visibility of an already cluttered environment can raise critical issues related to surgical precision and safety. Reconnecting the essential visuomotor sensory feedback is important for the safe practice of robot-assisted MIS procedures. This paper introduces a novel gaze-contingent framework for real-time haptic feedback and virtual fixtures by transforming visual sensory information into physical constraints that can interact with the motor sensory channel. We demonstrate how motor tracking of deforming tissue can be made more effective and accurate through the concept of Gaze-Contingent Motor Channelling. The method is also extended to 3D by introducing the concept of Gaze-Contingent Haptic Constraints where eye gaze is used to dynamically prescribe and update safety boundaries during robot-assisted MIS without prior knowledge of the soft-tissue morphology. Initial validation results on both simulated and robot assisted phantom procedures demonstrate the potential clinical value of the technique. In order to assess the associated cognitive demand of the proposed concepts, functional Near-Infrared Spectroscopy is used and preliminary results are discussed.
in list: Medical research
ABSTRACT
Two problem-solving experiments investigated the relationship between planning and the cost of accessing goal-state information using the theoretical framework of the soft constraints hypothesis (Gray & Fu, 2004; Gray, Simms, Fu, & Schoelles, 2006). In Experiment 1, 36 participants were allocated to low, medium, and high access cost conditions and completed a problem-solving version of the Blocks World Task. Both the nature of planning (memory based or display based) and its timing (before or during action) changed with high goal-state access cost (a mouse movement and a 2.5-s delay). In this condition more planning before action was observed, with less planning during action, evidenced by longer first-move latencies, more moves per goal-state inspection, and more short (≤0.8 s) and long (>8 s) “preplanned” intermove latencies. Experiment 2 used an eight-puzzle-like transformation task and replicated the effect of goal-state access cost when more complex planning was required, also confirmed by sampled protocol data. Planning before an episode of move making increased with higher goal-state access cost, and planning whilst making moves increased with lower access cost. These novel results are discussed in the context of the soft constraints hypothesis.
in list: Cognitive & Behavioural Psychology
ABSTRACT
In laboratory experiments, infants can learn patterns of features that co-occur (e.g., Fiser & Aslin, 2002). This finding leaves two questions unanswered: What do infants do with the knowledge acquired from such statistical learning, and which patterns do infants attend to in the noisy and cluttered world outside of the laboratory? Here, we show that 9-month-old infants form expectations about co-occurring features remaining fused, an essential skill for object individuation and recognition (e.g., Goldstone, 2000; Schyns & Rodet, 1997). We also show that though social cues may temporarily detract attention away from learning events, they appear to stimulate infants to display learning better in complex situations than when infants learn on their own without attention cues. These findings suggest that infants can use feature co-occurrence to learn about objects and that social cues shape such foundational learning in a noisy environment during infancy.
in list: Developmental Research
ABSTRACT
Despite the word’s common usage by gamers and reviewers alike, it is still not clear what immersion means. This paper explores immersion further by investigating whether immersion can be defined quantitatively, describing three experiments in total. The first experiment investigated participants’ abilities to switch from an immersive to a non-immersive task. The second experiment investigated whether there were changes in participants’ eye movements during an immersive task. The third experiment investigated the effect of an externally imposed pace of interaction on immersion and affective measures (state-anxiety, positive affect, negative affect). Overall the findings suggest that immersion can be measured subjectively (through questionnaires) as well as objectively (task completion time, eye movements). Furthermore, immersion is not only viewed as a positive experience: negative emotions and uneasiness (i.e. anxiety) also run high.
in list: General Eye Tracking
ABSTRACT
Games arguably have the most impressive success of any computer-based application and it would be useful to be able to extract some of the successful features of games for use in different application areas. Whilst games are clearly a multi-faceted phenomenon, when talking about games, gamers and reviewers often refer to the immersive experience of the game as being of particular importance. Moreover, the term immersion can be applied across many different genres of games from first person shooters, to strategy games and simulations. However, whilst many people use the term immersion, it is not clear exactly what this term means or whether the experience of immersion is the same across different games. Earlier qualitative studies (Brown & Cairns, 2004) showed that immersion can be better understood as a scale of experience with lower levels of immersion leading to higher levels. The purpose of our current work is to consider if it is possible to quantify the experience of immersion through more objective measures of the cognition of an immersed person such as eye-movements.
in list: General Eye Tracking
ABSTRACT
This paper presents an exploratory empirical study about users’ reception and usage behavior with interactive information graphics. 14 participants took part in the study. We assume users to act interest-driven. Therefore no explicit tasks were assigned to participants. In order not to distract the user, retrospective thinking aloud was employed. Results show that (1) usage durations were heterogeneous between users and between different types of interactive information graphics; (2) users tended to watch introductory animations; (3) initial orientation without interaction on the first content screen (after intro) was rather long with 23 seconds on average; (4) story-based approaches seem to motivate users but might lead to less intensive reception of information; (5) several reception and usage problems have been identified regarding information presentation and interaction. Interactive information graphics tend to overwhelm users with too much information and disregard well-known principles and rules of the old media and web design.
in list: HCI & Usability
ABSTRACT
This paper reports on the preliminary findings of a user study that explored how searchers fixate on information associated with different relevance criteria during the process of predictive relevance judgment. In order to address this objective a user study was conducted that involved the completion of questionnaires, use of eye tracking technology, talk aloud protocols and post-search interviews. As opposed to previous studies, the present research asked participants to search for real information needs that represented different search contexts (e.g. from searches about personal interest to academic related searches). This permitted the identification of several relevance criteria that naturally occur across different search contexts and the emergence of some fixation patterns, not observed before, associated to the use of these criteria. The paper concludes with a discussion of the impact and implication of this study in the wider context of relevance judgment and information seeking in context research.
in list: HCI & Usability
ABSTRACT
Objective: Using eye-tracking technology, we aim to examine if there are common patterns of visual attention strategies employed by surgeons that are associated with a greater chance of successful reorientation when disorientated during laparoscopic cholecystectomy.
Summary Background Data: Laparoscopic cholecystectomy is one of the most commonly practiced minimally invasive procedures with a recognized morbidity relating to bile duct injuries. It has been suggested that the majority of bile duct injuries occur as a result of operator disorientation.
Methods: A total of 21 surgeons of varying experience participated in the study. Attention as represented by gaze was captured, as subjects were presented with 8 images of various stages of a laparoscopic cholecystectomy with the task of interpreting the orientation of the image. Subject fixations on relevant anatomic structures within the images were analyzed and a visual behavior profiling algorithm was applied to compare the behavior of individual surgeons.
Results: No difference in orientation performance between seniority levels or with laparoscopic experience was found. Key structures used as "anchor objects" to successfully orientate at various stages of a laparoscopic cholecystectomy were unveiled, and a representative successful visual attention behavior for each stage of the operation was described.
Conclusion: There are discernable and quantifiable visual attention strategies used by surgeons during laparoscopic cholecystectomy associated with successful orientation. By quantifying visual behavior and by inference attention processes of surgeons, this study represents an initial step in attempting to decrease the morbidity associated with disorientation. This study raises some important questions. First, can these common reorientation strategies be taught to aspiring surgeons as part of a curriculum thereby decreasing the learning curve associated with the apparent need for experience in laparoscopy? Second, can these common reorientation strategi
in list: Medical research
ABSTRACT
The success of MIS is coupled with an increasing demand on surgeons’ manual dexterity and visuomotor coordination due to the complexity of instrument manipulations. The use of master-slave surgical robots has avoided many of the drawbacks of MIS, but at the same time, has increased the physical separation between the surgeon and the patient. Tissue deformation combined with restricted workspace and visibility of an already cluttered environment can raise critical issues related to surgical precision and safety. Reconnecting the essential visuomotor sensory feedback is important for the safe practice of robot assisted MIS procedures. This paper introduces a novel gaze-contingent framework for real-time haptic feedback and virtual fixtures by transforming visual sensory information into physical constraints that can interact with the motor sensory channel. We demonstrate how motor tracking of deforming tissue can be made more effective and accurate through the concept of Gaze-Contingent Motor Channelling. The method is also extended to 3D by introducing the concept of Gaze-Contingent Haptic Constraints where eye gaze is used to dynamically prescribe and update safety boundaries during robot assisted MIS without prior knowledge of the soft-tissue morphology. Initial validation results on both simulated and robot assisted phantom procedures demonstrate the potential clinical value of the technique. In order to assess the associated cognitive demand of the proposed concepts, functional near-infrared spectroscopy is used and preliminary results are discussed.
in list: Medical research
ABSTRACT
Interacting with a dynamic environment calls for close coordination between the timing and direction of motor behaviors.
Accurate motor behavior requires the system to predict where the target for action will be, both when action planning is
complete and when the action is executed. In the current study, we investigate the time course of velocity information
accrual in the period leading up to a saccade toward a moving object. In two experiments, observers were asked to generate
saccades to one of two moving targets. Experiment 1 looks at the accuracy of saccades to targets that have trial-by-trial
variations in velocity. We show that the pattern of errors in saccade landing position is best explained by proposing that trialby-
trial target velocity is taken into account in saccade planning. In Experiment 2, target velocity stepped up or down after a
variable interval after the movement cue. The extent to which the movement endpoint reflects pre- or post-step velocity can
be used to identify the temporal velocity integration window; we show that the system takes a temporally blurred snapshot of
target velocity centered È200 ms before saccade onset. This estimate is used to generate a dynamically updated prediction
of the target’s likely future location.
in list: Ophthalmology & Vision science
ABSTRACT
Initiating an eye movement is slowed if the saccade is directed to a location that has been fixated in the recent past. We show that this inhibitory effect is modulated by the temporal statistics of the environment: If a return location is likely to become behaviorally relevant, inhibition of return is absent. By fitting an accumulator model of saccadic decision-making, we show that the inhibitory effect and the sensitivity to local statistics can be dissociated in their effects on the rate of accumulation of evidence, and the threshold controlling the amount of evidence needed to generate a saccade.
in list: Ophthalmology & Vision science
ABSTRACT
In this paper, we investigate how controlled changes to image properties and orientation affect eye movements for repeated viewings of images of natural scenes. We make changes to images by manipulating low-level image content (such as luminance or chromaticity) and/or inverting the image. We measure the effects of these manipulations on human scanpaths (the spatial and chronological path of fixations), additionally comparing these effects to those predicted by a widely used saliency model (L. Itti & C. Koch, 2000). Firstly we find that repeated viewing of a natural image does not significantly modify the previously known repeatability (S. A. Brandt & L. W. Stark, 1997; D. Noton & L. Stark, 1971) of scanpaths. Secondly we find that manipulating image features does not necessarily change the repeatability of scanpaths, but the removal of luminance information has a measurable effect. We also find that image inversion appears to affect scene perception and recognition and may alter fixation selection (although we only find an effect on scanpaths with the additional removal of luminance information). Additionally we confirm that visual saliency as defined by L. Itti and C. Koch’s (2000) model is a poor predictor of real observer scanpaths and does not predict the small effects of our image manipulations on scanpaths.
in list: Ophthalmology & Vision science
ABSTRACT
Visual fixation patterns whilst viewing complex photographic scenes containing one person were studied in 24 high-functioning adolescents with Autism Spectrum Disorders (ASD) and 24 matched typically developing adolescents. Over two different scene presentation durations both groups spent a large, strikingly similar proportion of their viewing time fixating the person's face. However, time-course analyses revealed differences between groups in priorities of attention to the region of the face containing the eyes. It was also noted that although individuals with ASD were rapidly cued by the gaze direction of the person in the scene, this was not followed by an immediate increase in total fixation duration at the location of gaze, which was the case for typically developing individuals.
in list: Neuropsychology
ABSTRACT
This paper describes a study that seeks to explore the correlation between eye movements and the interpretation of geometric shapes. This study is intended to inform the development of an eye tracking interface for computational tools to support and enhance the natural interaction required in creative design.
A common criticism of computational design tools is that they do not enable manipulation of designed shapes according to all perceived features. Instead the manipulations afforded are limited by formal structures of shapes. This research examines the potential for eye movement data to be used to recognise and make available for manipulation the perceived features in shapes.
The objective of this study was to analyse eye movement data with the intention of recognising moments in which an interpretation of shape is made. Results suggest that fixation duration and saccade amplitude prove to be consistent indicators of shape interpretation.
in list: Ophthalmology & Vision science
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