TY - GEN
T1 - Temporal effects in a security inspection task
T2 - 51st Annual Meeting of the Human Factors and Ergonomics Society, HFES 2007
AU - Ghylin, K. M.
AU - Drury, C. G.
AU - Batta, R.
AU - Lin, L.
PY - 2007
Y1 - 2007
N2 - Data from certified screeners performing an x-ray inspection task for 4 hours, or 1000 images, were analyzed to identify the nature of the vigilance decrement. The expected vigilance decrement was found, with performance measured by probability of detection (PoD) and probability of false alarm [P(FA)] decreasing from hour 1 to hour 4. Correlations between PoD and P(FA) indicate that sensitivity between hours remained the same, however a shift in criterion (Beta) occurred. Significant decreases in both detection and stopping time were found from the first hour to the second, third, and fourth hour. Evidence of changes in the search component of the time per item was found to account for part of the vigilance decrement. As the task continued, participants spent less time actively searching the image, as opposed to other activities. Evidence is provided for truncation of active search as security inspection continues.
AB - Data from certified screeners performing an x-ray inspection task for 4 hours, or 1000 images, were analyzed to identify the nature of the vigilance decrement. The expected vigilance decrement was found, with performance measured by probability of detection (PoD) and probability of false alarm [P(FA)] decreasing from hour 1 to hour 4. Correlations between PoD and P(FA) indicate that sensitivity between hours remained the same, however a shift in criterion (Beta) occurred. Significant decreases in both detection and stopping time were found from the first hour to the second, third, and fourth hour. Evidence of changes in the search component of the time per item was found to account for part of the vigilance decrement. As the task continued, participants spent less time actively searching the image, as opposed to other activities. Evidence is provided for truncation of active search as security inspection continues.
UR - https://www.scopus.com/pages/publications/58149469790
M3 - Conference contribution
AN - SCOPUS:58149469790
SN - 9781605600376
T3 - Proceedings of the Human Factors and Ergonomics Society
SP - 93
EP - 97
BT - 51st Annual Meeting of the Human Factors and Ergonomics Society, HFES 2007
Y2 - 1 October 2007 through 5 October 2007
ER -