When we organize patterns in order to perceive an entire stimulus rather than just its parts, we are using principle of perception.

The principle of closure states that we organize our perceptions into complete objects rather than as a series of parts ([link]). Good continuation would suggest that we are more likely to perceive this as two overlapping lines, rather than four lines meeting in the center.

answer; ///attempts to change more than once behavior at the same time;

answer; group behavior;