Behavioral and Brain Sciences

Open Peer Commentary

Parental criticism and warmth toward unrecognized monozygotic twins

Robert Goodmana1 and Jim Stevensona2

a1 Department of Child and Adolescent Psychiatry, Institute of Psychiatry, London SE5 8AF, England, Electronic mail: goodman@jvncc.bitnet

a2 Department of Psychology, University of Surrey, Guildford, Surrey GU2 5XH, England