Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleBBS volume 10 issue 4 Cover and Front matter.PublicationBehavioral & Brain Sciences, 1987, Vol 10, Issue 4, pf1ISSN0140-525XPublication typeArticleDOI10.1017/S0140525X00054431