Effects of Cognitive Foveal Load on a Peripheral Single-Target Detection Task

Chan, H. S.; Courtney, Alan J.

doi:10.2466/pms.1993.77.2.515

Cited by 46 publications

(34 citation statements)

References 18 publications

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“…The subjects initiated each stimulus presentation. Presentation was for 250 ms, which was considered short enough to minimise saccadic movements [32,33,34]. A postexposure masking line with all object positions filled with asterisks of the same size as the stimulus objects was presented immediately after stimulus presentation.…”

Section: Methodsmentioning

confidence: 99%

Effect of linear magnification on target detection performance in visual inspection

Chan

2004

The International Journal of Advanced Manufacturing Technology

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This paper reports on an experiment on the effects of four levels of linear magnification (no scaling, 1.3 times scaling, 1.69 times scaling and 2.2 times scaling) on the detection of peripheral visual targets on four axes (eight meridians). Performance was measured by the linear dimensions of the sensitivity limit on a meridian (in deg) and by the number of locations at which targets were correctly detected within the two sensitivity limits on each axis. The sensitivity limit was defined as the farthest eccentricity at which 50% correct target detection was achieved. Detection performance with scaled stimuli was better than performance with non-scaled stimuli as shown by the increase in sensitivity limits with the increase in scaling. However, the number of targets correctly detected within the sensitivity limits was statistically equal for all the scaling levels. Enlarging object size at central locations to the same degree as those in the periphery yielded little benefit under the conditions of this experiment. For the conditions used here, this result indicated the ineffectiveness of scaling stimulus in the vicinity of fixation under linear magnification. The result emphasises the importance of selecting appropriate inter-object spacing as well as object size for displays designed to facilitate performance on visual search tasks. From an economic point of view, it seems to be wasteful to enlarge targets at the vicinity of fixation to the same degree as those at more eccentric locations.

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Section: Methodsmentioning

confidence: 99%

Effect of linear magnification on target detection performance in visual inspection

Chan

2004

The International Journal of Advanced Manufacturing Technology

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“…This experiment confirms their doubts, and adds to the evidence that argues against the easiest conceptualization of such attentional degradation. The few marginal results that have reported tunnel vision (Chan and Courtney, 1993;Williams, 1988) look increasingly to be task-specific at the very least. The main effect of eccentricity, and the subsequent analysis of the target eccentricities in the 7 þ category (according to whether the peripheral target was detected or not), supports the noted drop-off in performance occurring around 8-9 reported by Crundall et al (1999).…”

Section: Peripheral Target Detectionmentioning

confidence: 99%

Attending to the peripheral world while driving

Crundall¹,

Underwood²,

Chapman³

2002

Applied Cognitive Psychology

123

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Do inexperienced drivers see less of the world when driving? Previous research suggests that participants detect fewer peripheral targets while watching video clips of dynamic hazardous driving scenes due to increases in foveal demand (i.e. the presence of a hazard), increases in peripheral target eccentricity, and the lack of driving experience. The current study aimed to further explore the role of experience as a key factor in the potential narrowing of spatial attention, and the possibility of differences in the time course of attentional deployment. It was predicted that the amount of narrowing due to central processing demands would change as a function of driving experience, with more experienced drivers suffering less narrowing due to their mastery of central processing demands in road scenes. The data did not support the narrowing hypothesis, though they did support the alternative strategic difference between the driver groups in the time-course of attentional deployment. Learners seem to suffer attentional degradation in extra-foveal regions over a longer period of time whereas experienced drivers seem to invest peripheral attention at the hazard location in short but intense bursts.

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“…Although participants were not fixating the tools for long periods, the decision of when, or even if, to switch attention towards an automated tool can impose an overhead cost. When operators are overloaded they can experience attentional tunneling (Chan & Courtney, 1993;Wickens & Alexander, 2009) whereby their attention focuses on one part of the task, often to the detriment of other aspects.…”

Section: Discussionmentioning

confidence: 99%

Decision support and vulnerability to interruption in a dynamic multitasking environment

Hodgetts

Tremblay

Vallières

et al. 2015

International Journal of Human-Computer Studies

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Using a microworld simulation of maritime decision making, we compared two decision support systems (DSS) in their impact upon recovery from interruption. The Temporal Overview Display (TOD) and Change History Table (CHT) -designed to support temporal awareness and change detection, respectively -have previously proven useful in improving situation awareness; however, evaluation of support tools for multitasking environments should not be limited to the specific aspects of the task that they were designed to augment. Using a combination of performance, self-report, and eye-tracking measures, we find that both DSS counter-intuitively have a negative effect on performance. Resumption lags are increased, elevated post-interruption decision-making times persist for longer, and defensive effectiveness is impaired relative to No-DSS. Eye-tracking measures indicate that in the baseline condition, participants tend to encode the visual display more broadly, where as those in the two DSS conditions may have experienced a degree of attentional tunnelling due to high workload. We suggest that for a support tool to be beneficial it should ease the burden on attentional resources so that these can be used for reconstructing a mental model of the post-interruption scene.

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Effects of Cognitive Foveal Load on a Peripheral Single-Target Detection Task

Cited by 46 publications

References 18 publications

Effect of linear magnification on target detection performance in visual inspection

Effect of linear magnification on target detection performance in visual inspection

Attending to the peripheral world while driving

Decision support and vulnerability to interruption in a dynamic multitasking environment

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