**Exclusion Criteria** Subject data will be excluded on the following grounds: * Subjects reported being under 18 years of age. * Subjects reported problems with experimental playback, such as stuttering, freezing (pre-determined options) or another issue specified in a free-response. * Subjects reported needing correction to their vision but not wearing it during the experiment. * Subjects reported counts that err by more than 50% in either direction more than once. * Subjects report any abnormalities with their color vision. * Subjects misidentify the number in Ishihara Plate 9. * Subjects reported having performed a similar task before, wherein they tracked multiple objects and something unexpected appeared. * Subjects failed to answer any question during the course of the experiment. **Measures** <br> After each trial in which no unexpected object appears and after the critical trial, we will collect subjects' counts of how many times the attended objects bounced off the edge of the frame. On the critical trial, we will ask whether an extra object was present during the trial, and then ask them to describe the shape and color from a menu of pre-determined options. Subjects will be counted as having noticed the object only if they affirm having seen something new and correctly identify either its shape, color, or both. <br> We will also collect a set of demographic data for exclusion purposes, as well as characterizing our sample. We will verify that there are no systematic differences in the data based on country of origin, and we will verify that the two conditions (attend white vs. attend nonwhite) have similar error rates to ensure that one version of the task is not more difficult than the other. **Power** Because the effects we are looking for are so large, we are halving our sample size to 50 per condition in order to more efficiently run the replication. We will have over 99% power to detect a difference in proportions of 30%, which was the smallest effect in our previous experiment, and 91% power to detect a difference of 20%. **Analysis** <br> We will be looking for the same pattern we found in our previous experiment--when people ignore the varying color set, all colors other than the constant, attended one should be suppressed. For each condition (current color, previous color, or new color), we will determine the difference in noticing rates (notice when attending constant - notice when attending varying) and compute a 95% confidence interval around that difference. To have replicated our previous experiment, we should find large, negative differences in all conditions. We will also conduct exploratory analyses to investigate possible effects of presenting a previously seen color from the first trial versus the second trial in the previous-color condition.