Mean tracking accuracy by snapshot condition and recognition.

<p>Accuracy measured as the proportion of targets tracked, averaged across trials in each condition, separately for each observer. Group means also included. All error bars represent 95% confidence intervals, and were calculated as per Morey [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0083872#B64" target="_blank">64</a>] for the group data. Missing confidence intervals indicate conditions in which there were very few samples (<20).