GARTH FLETCHER, PHD, is Professor of Psychology at Victoria University of Wellington, New Zealand. JEFFRY A. SIMPSON, PHD, is Professor of Psychology and Director of the Doctoral Minor in Interpersonal Relationships at the University of Minnesota, USA. LORNE CAMPBELL, PHD, is Professor of Psychology at the University of Western Ontario, Canada. NICKOLA C. OVERALL, PHD, is Professor of Psychology at the University of Auckland, New Zealand.