Towards an express-diagnostics for level of processing and hazard perception

Velichkovsky, Boris M.; Rothert, A.; Kopf, Mathias; Dornhöfer, Sascha M; Joos, M.

doi:10.1016/s1369-8478(02)00013-x

Cited by 152 publications

(148 citation statements)

References 2 publications

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“…Each non-consecutive visit is referred to as a visual element instance. For example, LLTPL has two visual element instances of L. These instances are differentiated by giving them different numbers based on their durations as the durations are associated with information processing [Velichkovsky et al 2002;Follet et al 2011]. In particular, the longest instance of a particular element will get the first number in an individual scanpath (such as L1 T1 P1 L2).…”

Section: First Pass: Trending Visual Elementsmentioning

confidence: 99%

Eye tracking scanpath analysis on web pages

Eraslan

Yeşi̇lada

Harper

2016

Proceedings of the Ninth Biennial ACM Symposium on Eye Tracking Research &Amp; Applications

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The number of users required for usability studies has been a controversial issue over 30 years. Some researchers suggest a certain number of users to be included in these studies. However, they do not focus on eye tracking studies for analysing eye movement sequences of users (i.e., scanpaths) on web pages. We investigate the effects of the number of users on scanpath analysis with our algorithm that was designed for identifying the most commonly followed path by multiple users. Our experimental results suggest that it is possible to approximate the same results with a smaller number of users. The results also suggest that more users are required when they serendipitously browse on web pages in comparison with when they search for specific information or items. We observed that we could achieve 75% similarity to the results of 65 users with 27 users for searching tasks and 34 users for browsing tasks. This study guides researchers to determine the ideal number of users for analysing scanpaths on web pages based on their budget and time.

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Section: First Pass: Trending Visual Elementsmentioning

confidence: 99%

Eye tracking scanpath analysis on web pages

Eraslan

Yeşi̇lada

Harper

2016

Proceedings of the Ninth Biennial ACM Symposium on Eye Tracking Research &Amp; Applications

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“…According to the two visual systems hypothesis, the relationship between fixation durations and saccade amplitudes over time is systematic and indicative of two qualitatively distinct modes of scanning: global and local scanning (Frost & Poppel, 1976;Pannasch et al, 2008;Pannasch & Velichkovsky, 2009;Unema et al, 2005;Velichkovsky, Joos, Helmer, & Pannasch, 2005;Velichkovsky, Rothert, Kopf, Dornhoefer, & Joos, 2002;Velichkovsky et al, 2003). Accordingly, global processing can be seen as an orienting phase, during which shorter fixations and larger amplitudes dominate, presumably to capture the gist of a scene and establish regions of interest.…”

Section: Introductionmentioning

confidence: 99%

Examining the influence of task set on eye movements and fixations

Mills¹,

Stigchel²,

Hollingworth³

et al. 2010

PsycEXTRA Dataset

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The purpose of the present study was to examine the influence of task set on the spatial and temporal characteristics of eye movements during scene perception. In previous work, when strong control was exerted over the viewing task via specification of a target object (as in visual search), task set biased spatial, rather than temporal, parameters of eye movements. Here, we find that more participant-directed tasks (in which the task establishes general goals of viewing rather than specific objects to fixate) affect not only spatial (e.g., saccade amplitude) but also temporal parameters (e.g., fixation duration). Further, task set influenced the rate of change in fixation duration over the course of viewing but not saccade amplitude, suggesting independent mechanisms for control of these parameters.

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“…For instance, the scanpath IGII includes two instances of the element I. The algorithm differentiates these instances by assigning them different numbers based on their total durations as the durations are correlated with information processing [24,11]. Specifically, the first number is assigned to the longest instance of a particular element in an individual scanpath (e.g.…”

Section: Sta: Scanpath Trend Analysismentioning

confidence: 99%

Trends in Eye Tracking Scanpaths

Eraslan

Yeşi̇lada

Harper

2016

Proceedings of the 27th ACM Conference on Hypertext and Social Media

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Eye tracking has been widely used to investigate user interactions with the Web to improve user experience. In our previous work, we developed an algorithm called Scanpath Trend Analysis (STA) that analyses eye movement sequences (i.e., scanpaths) of multiple users on a web page and identifies their most commonly followed path in terms of the visual elements of the page. These visual elements are mainly the segments of a page generated by automated segmentation approaches. In our previous work, we also showed that the STA algorithm performs better than other existing algorithms in terms of providing the most representative scanpath of users. However, we did not know whether the validity of the algorithm is limited to a particular segmentation approach. In this paper, we investigate the effect of two different segmentation approaches on the STA algorithm. The results suggest that the validity of the algorithm is not affected by the segmentation approach used. Specifically, the resulting scanpath of the STA algorithm is the most representative scanpath of users in comparison with the resulting scanpaths of other existing algorithms regardless of the segmentation approach used.

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Towards an express-diagnostics for level of processing and hazard perception

Cited by 152 publications

References 2 publications

Eye tracking scanpath analysis on web pages

Eye tracking scanpath analysis on web pages

Examining the influence of task set on eye movements and fixations

Trends in Eye Tracking Scanpaths

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