288 



Index 



Labyrinth habits, 262. 



Labyrinth method, 200, 225. 



Labyrinth path, formula, 222, 225; 

 method of recording, 219. 



Ladder climbing tests, 201. 



Landois, H., account of dancer, 2. 



Lathrop, A., dancers, n. 



Learning, process, 239; methods of, 

 in dancer, 199; by being put 

 through act, 201 ; by imitation, 

 206; by rote, 234; rapidity of, 

 227, 234, 239; permanency of, 239; 

 learning and re-learning, 25 1 ; 

 curves of, 257. 



Left whirlers, 37, 225, 279. 



Life span of dancer, 228, 270. 



Light, reflected, 151; transmitted, 

 151; unit of measurement, 121; 

 control of, 156. 



Litter, size of, in dancer, 21, 23. 



Lummer-Brodhun photometer, 121, 



157- 



MALES, dancing of, 34; fighting and 

 killing young, 20; designation of, 

 3, 102; voice of, 75. See Sex. 



Manege movements, 32. 



Mark, E. L., cages, 16. 



Maze. See Labyrinth. 



Measurements, of light, 121, 156; of 

 rapidity of habit formation, 210, 

 227; of intelligence, 237; of effi- 

 ciency of training, 239. 



Memory, defined, 25 1 ; for ladder 

 climbing, 205; tests of, 252; 

 measurements of, 254; span of, 

 254; for brightness, 255; for 

 color, 256. 



Method, of studying dance, 33; for 

 testing hearing, 79; indirect, 81; 

 for testing vision, 92; motives, 98; 

 for brightness vision, 92, 113; for 

 color vision, 133, 151; of shifting 

 filters, 152; of testing form dis- 

 crimination, 179, 182; of testing 

 Weber's law, 118-129; develop- 

 ment of methods, 145, 210, 233; 



of choice, 131; food-box, 134;. 

 labyrinth, 184; of recording er- 

 rors, 189, 191, 220; of training: 

 problem method, labyrinth method, 

 discrimination method, 199; of 

 recording labyrinth path, 219; 

 qualitative versus quantitative, 226, 

 227; of studying senses, 226; val- 

 ues of methods, 227; of measuring 

 intelligence, 227; quantitative, 238; 

 comparisons of, 246. 



Milne- Edwards, origin of dancer, 1 2, 

 14. 



Mitsukuri, K., the dancer in Japan, 

 7,8. 



Mixed whirlers, 34, 279. 



Modifiability, of behavior, 199; of 

 useless acts, 205; index of, 237, 

 248, 261, 272. 



Motives, for activity, 82, 98; for 

 choice, 137; avoidance of dis- 

 comfort, 188; in labyrinths, 212, 

 218; desire to escape, to get food, 

 to avoid pain, 225. 



Motor, tendencies, 178; ability, 214; 

 capacity, 228. 



Movements, 2, 5, 32; of ears, 77. 



Mus musculus L., 7, 12, 15. 



Mus spiciosus L., 7. 



Mus sylvaticus L., 10. 



Nankin nesumi, name for dancer, 5, 



7- 



Negation, choice by, 131. 

 Nendel, R., gray papers, 114. 

 Nerve, eighth, 60. 

 Nervous system, 69, 71, 72. 

 Nest materials, 18. 

 Noises, effects of, 79. 

 Numbers, odd for females, even for 



males, 3, 102; reference, i. See 



Bibliographic List, xix. 



ODORS, discrimination by, 101, 149. 

 Old Fancier's description of dancer, 



29. 

 Olfactory sense. See Smell. . 



