Brown, G.; Stephens, D.N.
Laboratory of Experimental Psychology, University of Sussex, Falmer, Brighton, BN1 9QG, UK
Correspondence to D.N. Stephens, Laboratory of Experimental Psychology, University of Sussex, Falmer, Brighton, BN1 9QG, UK. E-mail: [email protected]
Received 26 October 2001 accepted as revised 20 January 2002