Problem, 9, 12, 33, 72, 74, 76, 109, 120, 191 f., 199, 207 Proof, 7, 27, 81 Pseudo-idea, 109 Psychological (_vs._ logical), 62 f. Purpose, 11 Ratiocination, 75 f., 83 Reason, reasoning, 75-8, 94 f., 98 Reasons, 5 f. Recitation, 201-13; factors in, 206-13 Reflection, 2 f., 5 f.; central function of, 116; double movement of, 79-84; five steps in, 72-8, 203 f. Regulation, 18-28; _see_ Control. Relation, relationship, 82, 97; _see_ Connection. Scientific thinking, 145-6 Sense training, 190-97 Sequence, 2; _cf._ Consequence. Sidgwick, 127 Signify, 7, 15 Signs, 16, 171-6 Spiral movement, _see_ Knowledge. Stimulus-response, 47 Studies, types of, 50 Subject matter, 58 f.; intellectual, 45 f.; logical, 61 f.; practical, 49; theoretical, 49; and the teacher, 204 f. Substitute signs, 177 f., 223 Succession, 3 Suggestion, 7, 12, 27, 74 f., 84 f.; control of, 84 f., 93; dimensions of, 34-7 Supposition, 4, 9 Suspense of judgment, 13, 74, 82 Symbols, _see_ Signs. Synthesis, 114 f. Terms, 3, 72 f., 76, 79, 95 Testing, 9, 13, 41, 82, 116; of deduction, 96, 99 Theory, 138 Theoretical, 137 Thinking, complete, 96, 98 f., 100; _see_ Reasoning, Reflection. Thought, 8 f.; educative value of, 2; reflective, 2; train of, 3; types of, 1 Truth, truths, 3 Uncertainty, _see_ Doubt, Perplexity. Unconscious, 214 ff. Uncritical thinking, 12 Understanding, 116-20; direct and indirect, 118-20, 136 Universal, 9 Vagueness, 129 f., 182, 212 Vailati, 81 n. Venn, 17 Verification, 77 Vocabulary, 180-4 Ward, 110 n. Warrant, 7 Wisdom, 52 Wonder, 31, 33 f. Wordsworth, 31 Work, 162-7, 217-19