Behavioral and Brain Sciences

Short Communication

What is structural similarity and is it greater in living things?

Keith R. Laws a1
a1 Department of Psychology, London Guildhall University, London E1 7NT, United Kingdom


Humphreys and Forde (H&F) propose that greater within- category structural similarity makes living things more difficult to name. However, recent studies show that normal subjects find it easier to name living than nonliving things when these are matched across category for potential artefacts. Additionally, at the level of single pixels, visual overlap appears to be greater for nonliving things.