An Introduction to Comparative Psychology

according action activity analysis animals appears aspect association attention body brain centres cerebral changes chapter chicks clear co-ordination communication complex conception concerning consciousness continuity correlation course deal definite describe determinate difficulty direct distinguish effect elements emotional energy evolution example existence experience explain express eyes fact faculty field focal focus follow further give given hand ideas illustrate important impression impulses individual intelligence interpretation involves knowledge less logical look marginal matter means memory mental merely method mind modes motor nature object observation once organic particular pass pecked perceived perception perhaps physiological possible practical present probably psychical psychology question reached reason reflection regard relations remember representative rise seen selective sensations sense sense-experience similar sound stage stick suggested suppose synthesis thought tion transition visual wave whole