What eye-tracking can tell us about multiple-target visual search

• Half of Satisfaction of Search errors were due to faulty scanning: searchers never fixated the second target, likely due to both scanning problems (i.e., an ineffective search pattern) and strategic problems (i.e., not searching long enough) • Recognition and Decision Errors account for the other half, with Recognition Errors more prevalent • This pattern is reversed from that found in radiology, where Decision Errors were most common, suggesting that the relative contributions of error types are influenced by the nature of the search and searchers • Refixating previously found targets contributed to Satisfaction of Search errors, imparing search efficiency • Strategic Errors contributed overtly to some trials, but likely contrubuted subtly to many Scanning Errors Breakdown of Second-Target Miss Errors