Research indicates that, for most people, on word-list or number-list tasks, the typical capacity of human working (short-term) memory without using rehearsal or any special aids is: Group of answer choices about 25 units of information, +/- 2 units. virtually unlimited (i.e. working memory can store millions of units of information). about 15 units of information, +/- 2 units. about 7 units of information, +/- 2 units