tion, or transmitting a
nerve-current.

_Sensitivity._ Property of, or capacity for being sensitive.

_Sensory._ Relating to a sense organ or to sensation.

_Situation._ The total environmental influences of any one moment.

_Socialistic instincts._ The instincts related more directly to the
survival of a social group.

_Stimulation._ The setting up of a nerve process in a sense organ or in
a nerve tract.

_Stimulus._ That which produces stimulation.

_Subnormal._ Having characteristics considerably below the normal.

_Tendency._ Probability of a nerve-current taking a certain direction
due to nerve-organization.

_Thinking._ The passing of images and ideas.

_Thought._ Thinking; an idea or group of ideas.

_Training._ Establishing nerve connection or bonds.

_Vividness._ Clearness of sensations, perceptions, images, and ideas.

INDEX

Abilities, specialized, 179

Ability, unusual, 206

Adaptation of vision, 41

After-images, visual, 40

Ancestors, 22 f.

Anger, 58

Appearance of instincts, 54

Applied psychology, 8-9, 210 ff.

Association of ideas, 152

Astigmatism, 44

Attention, 80 ff.;
and will, 82.

Attitude, 157

Behavior, 7

Bodily conditions, 76

Brain, 7

Brightness, sensation of, 38

Business, 215

Causality, 18, 21

Centrally initiated action, 51

Child, nature of, 11

Cold, sense of, 42

Collecting instinct, 62

College, function of, 217

Color blindness, 45

Color mixture, 39

Color, sensation of, 38

Completion test, 198

Concentrated practice, 102

Consciousness, 7

Conservatism, 109

Costly Temper test, 186

Cramming, 141

Criminal, the, 213 f.

Curriculum, 145

Darwin, 89

Defects of sense organs, 43

Development, individual, 24 ff.;
racial, 18-21;
significance of and causality, 21-24

Direct method, 112

Dizziness, organs that give us sense of, 42

Dramatization, 67

Drill in school subjects, 110-112

Dynamic, world as, 20

Economical practice, 101 ff.

Education, 210;
aim of, 10;
preparatory, 167;
science of, 9 ff.

Educational inferences, 143

Educational psychology, 9 ff.

Efficiency, 98, 108

Emotions, 74 ff.

Environment, 31

Environmental instincts, 61

Envy, 58

Evolution, 19 ff.

Exceptions, 101, 114

Excursions, 61

Experience, 8;
organization of, 169

Experiment, 13 ff.

Eye, the, 37

Eye defects, 43 ff.

Eyestrain, 20

Farsightedness, 44

F