Abstract
Wolfe J M. et al found that subject’s miss rate increased markedly when target prevalence decreased in simulated X-ray luggage screening task, which was so-called the low prevalence effect. He thought it was caused by shift of observer’s decision criteria. But the number of trials with target (NTT) also affected the effect. The present study had two experiments, and there were two blocks in each experiment. Subjects in Exp 1 were in different NTT (20 vs. 100) but the same target prevalence (both 50%); In Exp 2, NTT was the same (both 20) but the target prevalence was different (50% vs. 5%). The results showed that subject’s miss rate was mainly changed with NTT, and decision criteria was up to the target prevalence, Wolfe’s conclusion was not completely correct.
Chapter PDF
References
Hall, M.: Airport Screener Missed Weapons. Usa Today (September 23, 2004)
Palmer, J., Verghese, P., Pavel, M.: Vision Res., vol. 40, pp. 1227–1268 (2000)
Hancock, P.A., Hart, S.G.: Defeating Terrorism: What Can Human Factors/Ergonomics Offer? Ergonomics in Design 10(1), 6–16 (2002)
Wolfe, J.M., Horowitz, T.S., Kenner, N.M.: Rare Items Often Missed in Visual Searches. Nature 435(7401), 439–450 (2005)
Wolfe, J.M., Horowitz, T.S., Van Wert, M.J., et al.: Low Target Prevalence Is a Stubborn Source of Errors in Visual Search Tasks. Journal of Experimental Psychology: General 136(4), 623–638 (2007)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2011 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Yang, F., Sun, X., Zhang, K., Zhu, B. (2011). The Number of Trials with Target Affects the Low Prevalence Effect. In: Harris, D. (eds) Engineering Psychology and Cognitive Ergonomics. EPCE 2011. Lecture Notes in Computer Science(), vol 6781. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-21741-8_15
Download citation
DOI: https://doi.org/10.1007/978-3-642-21741-8_15
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-21740-1
Online ISBN: 978-3-642-21741-8
eBook Packages: Computer ScienceComputer Science (R0)