Suspiciousness perception in dynamic scenes: a comparison of CCTV operators and novices.
Perception of scenes has typically been investigated by using static or simplified visual displays. How attention is used to perceive and evaluate dynamic, realistic scenes is more poorly understood, in part due to the problem of comparing eye fixations to moving stimuli across observers. When the...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2013-08-01
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| Series: | Frontiers in Human Neuroscience |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fnhum.2013.00441/full |
| _version_ | 1817989944009818112 |
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| author | Christina Jayne Howard Tom eTroscianko Iain D. Gilchrist Ardhendu eBehera David C. Hogg |
| author_facet | Christina Jayne Howard Tom eTroscianko Iain D. Gilchrist Ardhendu eBehera David C. Hogg |
| author_sort | Christina Jayne Howard |
| collection | DOAJ |
| description | Perception of scenes has typically been investigated by using static or simplified visual displays. How attention is used to perceive and evaluate dynamic, realistic scenes is more poorly understood, in part due to the problem of comparing eye fixations to moving stimuli across observers. When the task and stimulus is common across observers, consistent fixation location can indicate that that region has high goal-based relevance. Here we investigated these issues when an observer has a specific, and naturalistic, task: closed-circuit television (CCTV) monitoring. We concurrently recorded eye movements and ratings of perceived suspiciousness as different observers watched the same set of clips from real CCTV footage. Trained CCTV operators showed a greater consistency in fixation location and greater consistency in suspiciousness judgements than untrained observers. Training appears to increase between-operators consistency by learning 'knowing what to look for' in these scenes. We used a novel ‘Dynamic Area of Focus (DAF)’ analysis to show that in CCTV monitoring there is a temporal relationship between eye movements and subsequent manual responses, as we have previously found for a sports video watching task. For trained CCTV operators and for untrained observers, manual responses were most highly related to between-observer eye position spread when a temporal lag was introduced between the fixation and response data. Shortly after between-observer eye positions became most similar, observers tended to push the joystick to indicate perceived suspiciousness. Conversely, shortly after between-observer eye positions became dissimilar, observers tended to rate suspiciousness as low. These data provide further support for this DAF method as an important tool for examining goal-directed fixation behaviour when the stimulus is a real moving image. |
| first_indexed | 2024-04-14T00:53:48Z |
| format | Article |
| id | doaj.art-aa665a6b71a94896b6f945e2d4df6e35 |
| institution | Directory Open Access Journal |
| issn | 1662-5161 |
| language | English |
| last_indexed | 2024-04-14T00:53:48Z |
| publishDate | 2013-08-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Human Neuroscience |
| spelling | doaj.art-aa665a6b71a94896b6f945e2d4df6e352022-12-22T02:21:42ZengFrontiers Media S.A.Frontiers in Human Neuroscience1662-51612013-08-01710.3389/fnhum.2013.0044153191Suspiciousness perception in dynamic scenes: a comparison of CCTV operators and novices.Christina Jayne Howard0Tom eTroscianko1Iain D. Gilchrist2Ardhendu eBehera3David C. Hogg4Nottingham Trent UniversityUniversity of BristolUniversity of BristolUniversity of LeedsUniversity of LeedsPerception of scenes has typically been investigated by using static or simplified visual displays. How attention is used to perceive and evaluate dynamic, realistic scenes is more poorly understood, in part due to the problem of comparing eye fixations to moving stimuli across observers. When the task and stimulus is common across observers, consistent fixation location can indicate that that region has high goal-based relevance. Here we investigated these issues when an observer has a specific, and naturalistic, task: closed-circuit television (CCTV) monitoring. We concurrently recorded eye movements and ratings of perceived suspiciousness as different observers watched the same set of clips from real CCTV footage. Trained CCTV operators showed a greater consistency in fixation location and greater consistency in suspiciousness judgements than untrained observers. Training appears to increase between-operators consistency by learning 'knowing what to look for' in these scenes. We used a novel ‘Dynamic Area of Focus (DAF)’ analysis to show that in CCTV monitoring there is a temporal relationship between eye movements and subsequent manual responses, as we have previously found for a sports video watching task. For trained CCTV operators and for untrained observers, manual responses were most highly related to between-observer eye position spread when a temporal lag was introduced between the fixation and response data. Shortly after between-observer eye positions became most similar, observers tended to push the joystick to indicate perceived suspiciousness. Conversely, shortly after between-observer eye positions became dissimilar, observers tended to rate suspiciousness as low. These data provide further support for this DAF method as an important tool for examining goal-directed fixation behaviour when the stimulus is a real moving image.http://journal.frontiersin.org/Journal/10.3389/fnhum.2013.00441/fullEye MovementsExpertisevisual searchscene perceptionsecurity and human factors |
| spellingShingle | Christina Jayne Howard Tom eTroscianko Iain D. Gilchrist Ardhendu eBehera David C. Hogg Suspiciousness perception in dynamic scenes: a comparison of CCTV operators and novices. Frontiers in Human Neuroscience Eye Movements Expertise visual search scene perception security and human factors |
| title | Suspiciousness perception in dynamic scenes: a comparison of CCTV operators and novices. |
| title_full | Suspiciousness perception in dynamic scenes: a comparison of CCTV operators and novices. |
| title_fullStr | Suspiciousness perception in dynamic scenes: a comparison of CCTV operators and novices. |
| title_full_unstemmed | Suspiciousness perception in dynamic scenes: a comparison of CCTV operators and novices. |
| title_short | Suspiciousness perception in dynamic scenes: a comparison of CCTV operators and novices. |
| title_sort | suspiciousness perception in dynamic scenes a comparison of cctv operators and novices |
| topic | Eye Movements Expertise visual search scene perception security and human factors |
| url | http://journal.frontiersin.org/Journal/10.3389/fnhum.2013.00441/full |
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