Loading...
Please wait, while we are loading the content...
Similar Documents
Effects of time pressure on searching for terrorist threats in X-ray air passenger luggage images
| Content Provider | Semantic Scholar |
|---|---|
| Author | Gale, Alastair G. |
| Copyright Year | 2007 |
| Abstract | In order to understand the development of skill in the domain of airport security an experiment was performed to examine how naïve obser vers searched a range of Xray images of air passenger luggage for potential t errorist threat items. For each image their eye movements were recorded remotely an d p rticipants had to rate their confidence in whether or not a potential threat ite m was present. Half of all observers had a restricted search time of 10 seconds and the others had an unlimited search time. Observer performance in identifying targets c orrectly was measured as the areas under their receiver operating characteristic (ROC) curves. Results showed that observers with an unlimited viewing time exhibited significantly better detection performance than those under the time pressure cond ition. The eye movement data revealed that naïve observers could fixate on a pot ential target early in their visual search of each image. Observers were particularly i nc ined to fixate on targets earlier and process visual information faster (i.e. with a shorter visual dwell time on the area of interest in the X-ray luggage image) in the time pr ssured condition. One possible interpretation between performance and the eye move ent data is a speed-accuracy relationship. The naïve observers lacked knowledge of possible threats which degraded their performance. Implications for traini ng of security screeners are discussed. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.hfes-europe.org/wp-content/uploads/2014/06/39-is.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
