Within ACL 4.4, the person pays attention to two striking features at a time. This results in a quicker and more accurate matching to a sample to complete a simple concept of an activity as both the horizontal and vertical linear information are used together. The other striking features which are used two at a time are colour, shape, size, number of items (up to four) and lines.
As the matching of information is not stored in working memory but rather it is stored for a second or two, the sample is referred to a few times in a new activity. Overlapping and partially hidden images are not accurately used.