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];