Is the whole really more than the sum of its parts? Estimates of average size and orientation are susceptible to object substitution masking
Journal of Experimental Psychology Human Perception & Performance (2013) - Comment
pubmed: 22642216  doi: 10.1037/a0028762  issn: 1939-1277  issn: 0096-1523 

Oscar Jacoby, Marc R. Kamke, Jason B. Mattingley