119, 128, 132

Story-telling, 482-483

Straining, 162-163

Strong, 246, 351

Struggle for existence, 114

Subconscious minds, 563-564

Sublimation, 533-535

Submissive tendency, 166-169, 287, 516, 549

Substitute, response, 299-301, 305, 311, 328, 400, 409-413, 430,
436-437, 498-499, 533;
stimulus, 298, 300, 303, 311, 368, 371-372, 376, 400-409, 416, 434, 568

Suggestion, 546-650

Suppression, 505-508, 533, 566-567

Surprise, 155

Survival value, 114, 139, 148, 151, 160

Survivals, 127

Sustained attention, 257-260

Syllogism, 476-479

Symbols, 383, 468, 505-507

Symmetry, 444

Synapse, 34-35, 96, 414-416

Synesthesia, 376

Tact, 555

Taste, 189-190, 201-208, 224

Taussig, 522

Telegraphy, learning of, 321-323

Temperament, 553-554

Temperature, responses, 141-142;
sense, 197-201, 224-225

Tendency, 68-85, 109-112, 116, 130-135, 137-169, 177, 257, 263,
299-301, 309, 348, 367, 382, 392-393, 408-409, 417, 483-499,
501-510, 512-516, 528-546, 561

Terman, 272, 296

Testimony, 347, 352, 397

Tests, 3, 12, 14, 272-277, 281-283, 548

Thalamus, 56, 62, 64-65, 178

Thinking, 48-49, 319-320

Third dimension, 441-443

Thirst, 79-81, 120-121, 139-140, 179

Thorndike, 20, 104, 171, 331, 418

Thought and action, 539-541

Thrill, 489, 498-499

Thyroid gland, 123, 554

Timbre, 231

Time, 438-439, 447

Titchener, 186, 242, 270, 461

Touch, 50, 62, 63, 197-201;
spots, 198

Toys, 486-497

Training of memory, 360-363

Traits, native and acquired, 89-102

Transfer, 316-317, 361-362

Trial and error, 112, 305, 309, 311, 313, 315, 335, 392, 409, 424, 426,
430, 462-465, 526

Typewriting, learning of, 324-325, 411-412, 518, 525-526, 537

Unconscious, activity, 265-266, 383-384, 506-508, 525-526, 562-565;
emotion, 118-119;
feeling, 172;
motive, 565-569;
retention, 348-349, 562

Unintentional learning, 346-348

Utility,
of emotion, 125-127;
of instinct, 114, 144-145;
of reflexes, 125

Vacillation, 530

Variability, 23, 273, 298, 369, 447-448

Verification of hypotheses, 473-475

Visual,
area, 62;
images, 370;
perception, 441-443, 450;
sensations, 204-228, 231-234

Visualist, 370

Vocalization, 93-94, 154

Voluntary action, 298, 524-528

Vowels, 231

Walking, 95-97, 99, 153

Warming-up, 74, 119-120, 343, 391

Warren, 171, 242, 418, 461

Washburn, 19, 88, 331

Watson, 20, 88,