Before revision:  First, we consider some simple memory binding tasks in which the output is set to be a copy of the given input and a selective sequence of previous inputs online. Next, we design a more complex binding taskbased on a cue that encodes binding relations .
After revision:  Three cases and their results are discussed similar to the n-back task called, first-order memory binding task, generalized first-order memory task, and second-order memory binding task .