Perceptual Skill Identification in a Complex Sport Setting

Kredel, Ralf; Klostermann, André; Lienhard, Olivia; Koedijker, Johan; Michel, Katja; Hossner, Ernst-Joachim

doi:10.1051/bioconf/20110100051

Cited by 12 publications

(17 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The EyeSeeCam (ESC) was connected to a MacBook Pro via a 20-m fiber-optic Fire Wire link (GOF-Repeater 800, Unibrain), stored in a bum bag. Since the eyetracker was synchronized with a ten-camera VICON-T20 system that tracks retro-reflective markers attached to the ESC, a three-dimensional gaze vector in a laboratory frame of reference could be calculated (Kredel et al, 2011). This gaze vector was updated every 5 ms and allowed for relating the participant's current gaze to the displayed targets or distractors, or to the centroid derived from the current positions of the targets.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Detecting single-target changes in multiple object tracking: The case of peripheral vision

Vater

Kredel

Hossner

2016

Atten Percept Psychophys

Self Cite

View full text Add to dashboard Cite

In the present study, we investigated whether peripheral vision can be used to monitor multiple moving objects and to detect single-target changes. For this purpose, in Experiment 1, a modified multiple object tracking (MOT) setup with a large projection screen and a constant-position centroid phase had to be checked first. Classical findings regarding the use of a virtual centroid to track multiple objects and the dependency of tracking accuracy on target speed could be successfully replicated. Thereafter, the main experimental variations regarding the manipulation of to-bedetected target changes could be introduced in Experiment 2. In addition to a button press used for the detection task, gaze behavior was assessed using an integrated eyetracking system. The analysis of saccadic reaction times in relation to the motor response showed that peripheral vision is naturally used to detect motion and form changes in MOT, because saccades to the target often occurred after target-change offset. Furthermore, for changes of comparable task difficulties, motion changes are detected better by peripheral vision than are form changes. These findings indicate that the capabilities of the visual system (e.g., visual acuity) affect change detection rates and that covert-attention processes may be affected by vision-related aspects such as spatial uncertainty. Moreover, we argue that a centroid-MOT strategy might reduce saccaderelated costs and that eyetracking seems to be generally valuable to test the predictions derived from theories of MOT.Finally, we propose implications for testing covert attention in applied settings.

show abstract

Section: Methodsmentioning

confidence: 99%

“…For this purpose, participants had to consecutively fixate five dots of a regular grid with a distance of 8.5°of visual angle between the dots (Kredel et al, 2011). The ESC was recalibrated before each test block whenever the point of gaze deviated more than 0.5°of visual angle from one of the dots in the calibration grid.…”

Section: Methodsmentioning

confidence: 99%

Detecting single-target changes in multiple object tracking: The case of peripheral vision

Vater

Kredel

Hossner

2016

Atten Percept Psychophys

Self Cite

View full text Add to dashboard Cite

show abstract

“…For the initial calibration of the ESC at the beginning of the session, the participant consecutively fixated on 5 dots creating a two-dimensional axis with an origin, and with dots separated by the distance of 8.58 of visual angle (Kredel et al, 2011). A recalibration procedure was implemented before test blocks in which the point of gaze deviated more than 0.58 of visual angle from one of the calibration grid dots.…”

Section: Apparatusmentioning

confidence: 99%

Disentangling vision and attention in multiple-object tracking: How crowding and collisions affect gaze anchoring and dual-task performance

2017

Self Cite

View full text Add to dashboard Cite

Previous studies of multiple-object tracking have shown that gaze behavior is affected by target collisions and target-distractor crowding. Therefore, in order to experimentally disentangle this collision-crowding confound, we examined events of target collisions with the bordering frame and crowding with distractors. We hypothesized that collisions are particularly demanding for covert attentional processing, whereas crowding particularly challenges peripheral vision. Results show that gaze is located closer to targets when they are crowded, as would be expected to reduce negative crowding effects by utilizing the higher spatial acuity of foveal vision. However, saccades, which interrupt visual information processing, were instead initiated as a function of target collisions with the bordering frame. Consequently, in a dual-task condition that required the detection of target changes, participants more frequently missed changes if they occurred in time intervals around a collision. Based on these results, superior performance should be expected if foveal gaze is optimally anchored among crowded targets and if potential target changes are monitored with peripheral vision. In addition to the implications for further laboratory research of multiple-object tracking, these findings are relevant to a multitude tasks that require the monitoring of several targets and the simultaneous detection of certain events in the visual periphery, as it is commonly the case, for instance, in sports.

show abstract

“…A further restriction of gaze studies is that the measured gaze vector must still be mapped manually to cues in the visual field, and those "educated guesses" obviously are afflicted with problems of reduced reliability and objectivity. Innovative automatic measurements based on algorithmic gaze-vector mappings may solve this problem in the future (Kredel et al, 2011). Even then, however, an a priori definition of potential areas of interest is indispensable.…”

mentioning

confidence: 99%

Decision making in beach volleyball defense: Crucial factors derived from interviews with top-level experts

Schläppi-Lienhard¹,

Hossner²

2015

Psychology of Sport and Exercise

Self Cite

View full text Add to dashboard Cite

Perceptual Skill Identification in a Complex Sport Setting

Cited by 12 publications

References 6 publications

Detecting single-target changes in multiple object tracking: The case of peripheral vision

Detecting single-target changes in multiple object tracking: The case of peripheral vision

Disentangling vision and attention in multiple-object tracking: How crowding and collisions affect gaze anchoring and dual-task performance

Decision making in beach volleyball defense: Crucial factors derived from interviews with top-level experts

Contact Info

Product

Resources

About