Visual Search Distributions
Abstract
In this paper, we explore the distribution of search times in narrow-field-of-view visual search tasks. In these types of experiments, it is typical to perform tests with multiple observers examining multiple scenes. The results are aggregated over all observers to find estimates of target conspicuity in each scene. Methods such as signal detection theory have been developed to take into account variations in observers. However, many of these methodologies are technically only applicable if certain strict conditions arc met. If one instead is interested in observer response time distributions, one generally averages over all the images as well, in order to obtain a sufficient number of data points. The question we address in this paper is whether one can say anything meaningful about the search time distribution for individual images, based on the aggregated search time distribution over all the images.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 16, 2003
- Accession Number
- ADA572235
Entities
People
- Robert E. Karlsen
Organizations
- United States Army Tank Automotive Research, Development and Engineering Center