Research index·Journal articleLife Sciences NotesScience News·22 Jul 1967NobleIDark:/48914/w1/20260523/667B783ADOI10.2307/3952566Journal articleLife Sciences NotesScience News · 1967 · SubscriptionNobleIDark:/48914/w1/20260523/667B783ADOI10.2307/3952566ReadRead at the publisherSaveCiteAdd to literature reviewPaywalledThe full text is at the publisherOpen it at the publisher to read it.Read at the publisherDiscussionAdd to the discussionCitations1Cited byTopicsPsychologyRelated papersMoreDetailsPublished, publisher, issueSuggest a correction or report