Figure 2.

Change detection and identification performance. (A) Change detection performance; people could report six objects in early retro-cue conditions, four and a half objects in late retro-cue conditions, and two objects in post-change cue conditions. When the objects were presented in color instead of in grayscale, people could remember slightly more objects. Performance is depicted as Cowan's K, a common method to estimate the representational capacity of short-term memory. (B) Identification performance after correct change detection; people were able to identify the item that was present in the memory display, but not anymore in the test display on 88% of the early retro-cue trials, on 71% of the late retro-cue trials, and on 53% of the post-change cue trials. (C) To derive the amount of high-resolution representations, we multiplied correct change detection performance with correct performance on the identification task. To derive the amount of low-resolution representations, we multiplied correct change detection performance with incorrect performance on the identification task. Data are depicted as the mean ± the standard error of the mean.