Separate features versus one principle: comment on Shimaya (1997).

In his article "Perception of Complex Line Drawings," A. Shimaya (1997) proposed a quantitative theory that was designed to predict perceived segmentations and amodal completions of line drawings. Shimaya further evaluated the integrative approach of structural information theory (SIT; R. Van Lier, P. Van der Helm, & E. Leeuwenberg, 1994) to pattern interpretation. It is argued in this comment that Shimaya's evaluation of the SIT approach is based on a misconception of SITs basic assumptions and an inappropriate data analysis.