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The Dancing Mouse A Study in Animal Behavior by Yerkes, Robert M., 1876-1956

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The Animal Behavior Series. Volume I The Dancing Mouse By 1907 Preface

Chapter I Characteristics, Origin, And History

Chapter Ii Feeding, Breeding, And Development Of The Young

Table I Development Of The Young

Chapter Iii Behavior: Dance Movements

Chapter Iv Behavior: Equilibration And Dizziness

Chapter V Structural Peculiarities And Behavior

Function Structure

Chapter Vi The Sense Of Hearing

Table 5 Period Of Auditory Reaction In Young Dancers

Chapter Vii The Sense Of Sight: Brightness Vision

Table 6 Brightness Discrimination

Table 7 Brightness Discrimination

Table 8 White-black Preference Tests

Table 11 Table 12 Position Of White Cardboards For A Set Of 150 Tests Series 1 2 3 4 5 6 7 8 9 10

Table 13 Gray Discrimination

Chapter Ix The Sense Of Sight: Color Vision

Table 15 Orange-blue Tests, With Food-box

Table 16 Yellow-red Tests

Table 17 Light Blue-orange Tests In Color Discrimination Box

Table 18 Light Blue-orange Test Condition Right Wrong

Table 22 Green-blue Tests

Table 23 Green-blue Tests

9 17 7 3 8 2 10 17 8 2 8 2

Table 24 Green-red Tests

Table 24-continued

Table 25 Green-red Tests

Table 26 Green-red Tests

Table 26-continued No. 2 No. 5

Table 27-continued

Chapter Xi The Role Of Sight In The Daily Life Of The Dancer

Table 30 Visual Form Tests

Table 31 The Role Of Sight No. 7 No. 998

Labyrinth-b Experiments

Table 33 The Role Of Sight, Touch, And Smell In Labyrinth Experiments Test Condition Errors Condition Errors

Table 34 Role Of Sight, Touch, And Smell In Labyrinth Experiments

Averages 11.2 5.7 14.5 .3 10.8 Females Averages 9.2 5.5 12.5 .3 9.5

Chapter Xii Educability: Methods Of Learning

Table 35 Ladder Climbing Test

Chapter Xiii Habit Formation: The Labyrinth Habit

Table 36 Results Of Labyrinth A Tests With Dancers

Table 37 Results Of Labyrinth A Tests With Common Mice

Table 38 Results Of Labyrinth-b Experiments, With Twenty Dancers Males Females

Table 39 Results Of Labyrinth-c Experiments, With Twenty Dancers Males Females

Av. 18.7 Av. 13.8

Table 40 Results Of Labyrinth-d Experiments, With Twenty Dancers Males Females

Chapter Xiv Habit Formation: The Discrimination Method

Table 41 Males Females

Chapter Xv The Efficiency Of Training Methods

Table 46 Efficiency Of Training

Method Index Of Modifiability (efficiency) Table 47 Efficiency Of Training

Chapter Xvi The Duration Of Habits: Memory And Re-learning

Table 48 Measurements Of The Duration Of A Habit

Table 49 White-black Training. Ten Tests Per Day

Table 50 White-black Training. Ten Tests Per Day

Indices Of Modifiability Learning Re-learning Table 51

Av. 8.2 17.3 7.0 18.8 5.0 9.2 Labyrinth C Labyrinth B Labyrinth D

Av. 19.7 26.5 5.0 18.2 5.7 8.3 Chapter Xvii Individual, Age, And Sex Differences In Behavior

Table 52 Series Males Females No. 76 No. 78 Av. No. 75 No. 77 Av. General Av.

Chapter Xviii The Inheritance Of Forms Of Behavior Right Whirlers Left Whirlers Mixed Whirlers Total

Individuals Of Mixed Descent 9 10 6 25 Table 53 The Inheritance Of The Habit Of White-black Discrimination Males Females

In answer to the question, how and when did the race of dancers originate, it may be said that historical research indicates that a structural variation or mutation which occasionally appears in _Mus musculus_, and causes those peculiarities of movement which are known as dancing, has been preserved and accentuated through selectional breeding by the Chinese and Japanese, until finally a distinct race of mice which breeds true to the dance character has been established. The age of the race is not definitely known, but it is supposed to have existed for several centuries.

CHAPTER II

FEEDING, BREEDING, AND DEVELOPMENT OF THE YOUNG

In this chapter I shall report, for the benefit of those who may wish to know how to take care of dancing mice, my experience in keeping and breeding the animals, and my observations concerning the development of the young. It is commonly stated that the dancer is extremely delicate, subject to diseases to an unusual degree and difficult to breed. I have not found this to be true. At first I failed to get them to breed, but this was due, as I discovered later, to the lack of proper food. For three years my mice have bred frequently and reared almost all of their young. During one year, after I had learned how to care for the animals, when the maximum number under observation at any time was fifty and the total number for the year about one hundred, I lost two by disease and one by an accident. I very much doubt whether I could have done better with any species of mouse. There can be no doubt, however, that the dancer is delicate and demands more careful attention than do most mice. In March, 1907, I lost almost all of my dancers from what appeared to be an intestinal trouble, but with this exception I have had remarkably good luck in breeding and rearing them.