Psychology, the science of mind, 2, 5; subject-matter of, as defined by common sense, 6 ff., 17, 34, 321; by science, 8 f., 329; leaves man in the world, 9, 307; takes account of nervous system, 10 ff., 17 f.; of animals, 12 ff., 32, 51, 134, 219 f., 247, 267; of plants, 13 f.,31 f., 230; problem of human, 14 ff., 18, 113, 148, 231, 326 f.; method of, 18 ff.; has recently become experimental, 25 f., 34; scope of, 30 ff., 329; classification of, 31 ff.; differential, 31 f., 309; immaturity of, 25 f., 34; difficulties of, to beginner, 34 ff., 90, 112 ff., 321 ff., 325 f.; definitions of, 38; may have begun with observation of expressive movements, 222; describes a generalised world, 307; has to do with self, 308 f.; has nothing to do with knowledge or awareness, 324 f.; in daily life, 329 f.; results of, are useful in practice, 4 f., 33, 232, 281, 310. Psychoneural processes, 164, 212. Psychotechnics, 33. Quality, of sensation, 65 f.; as basis of qualitative perception, 122; of simple feeling, 79, 81. Question, as stimulus to thought, 276 ff., 330. Rapport, hypnotic, 344 f. Reaction experiment, history of, 236 f., 252 ff.; simple form of, 238; aids us to analyse action, 238 f., 253; compound form of, 252 ff., 255; has not developed in accordance with classification of action, 252 f.; various uses of, 253 ff.; association reaction, 254 f. Reaction method, 253 ff. Reaction time, 238; sensory and motor, 240; significance of, 242, 254. Reason, 203, 207, 210, 301. Receptive imagination, 197 f. Recognition, analysis of, 177 ff.; hinges on feeling of familiarity, 178, 181, 184 f., 276; varies in definiteness, 179 f.; direct and indirect, 180 f.; halting and partial, 181; lapses to direct apprehension, 181 ff.; common-sense view of, 184; illusions of, 187 f. Recollection, 190 f. Recurrent images, 75, 78. Reflex, artificial, 244, 251; physiological, 244 f. Reinforcement, nervous, in attention, 106 ff., 164, 249 f. Relational feelings and attitudes, 279. Religious sentiments, 299 f., 302 f. Remembrance, 190. Repetition, as determinant of attention, 94, 163; strengthens associative tendencies, 153, 163. Representative gesture, 268 f. Resistance, perception of, 122. Retina, complex structure of, 58 ff., 60, 63; normal colour-blindness of, in daylight, 58, 62; central blindness of, in twilight, 60; compared with olfactory membrane, 63. Rhythm, perception of, 123, 125, 159 f.; subjective, 104; helps to establish associative tendencies, 153; in mnemonics, 193. Saturation, of colours, 57.