Habit was originally developed at the University of Texas, under the direction of Les Cohen.  The first version was a collaboration between Lisa Oakes and Les Cohen when she was a graduate student in his lab back in the 20th century.  It has been revised and reworked several times since then, and has been used by a number of labs around the world to study infant perceptual and cognitive development. 

A methods paper describing Habit 2 in detail is in review, but until that paper is published, please use the following text when citing Habit 2:

Oakes, L.M., Sperka, D. J., & Cantrell, L. (2015). Habit 2. Unpublished software. Center for Mind and Brain, University of California, Davis.