Psychological Monographs, Volume 11

Animal Intelligence animals animals tested apparatus appear aroused artificial stimuli association attention auditory imagery auditory presentation average blue Brown Thrush changes Chipping Sparrow curve fell determine digits discrete stimulus effect experimental experiments factors fatigue fifty per cent food reaction Geiger Geissler tube given grades green growth hundred per cent imitated cluck immediate recall increase index-hand indicate influence instinctive interval introspections investigation judgment later learning letters light material memory ment mental method minutes motor coördinations motor imagery Mourning Dove movements muscle negative nest nonsense syllables number of errors observer orange patient perception period position practice pronunciation Psychol pupils reaction of fear receptacles record red-orange red-red-orange Redwing relation seems sensations simultaneous space perception tapping tion violet visual imagery visual perception visual presentation visually minded vocalization word Wundt yellow ΙΟ