ABSTRACT
The term, fear, refers in everyday language to a particular emotional experience, the behavioural concomitants of which include response of immobility or flight, changes in breathing and sphincter control, etc. Fear may be brought about ‘ either by sudden and intense stimulation or by specific classes of stimuli that must be identified empirically for each species studied* (Verplanck, 1957). No doubt, such specific classes of stimuli are determinable for any one individual; but it is somewhat uncertain to what extent they are susceptible to identification for a species as a whole.
