THE DEVELOPMENT OF THE INTELLECT
O
BSERVATIONS
BY W. PREYER PROFESSOR OF PHYSIOLOGY IN JENA
TRANSLATED FROMTHE ORIGINAL GERMAN BYH.W. BROWN
TEACHER IN THE STATE NORMAL SCHOOL AT WORCESTER,
MASS.
NEW YORK D. APPLETON AND COMPANY 1895
COPYRIGHT, 1889, BY D. APPLETON AND COMPANY.
EDITOR'S PREFACE.
This second volume contains the further investigations of Professor Preyer
on the mind of the child. The former volume contained the first and sec-
ond portions, devoted respectively to the development of the senses and of
3 WILLIAM T. PREYER
the will. The present volume contains the third part, treating of the devel-
opment of the intellect; and three appendixes are added containing supple-
mentary matter.
Professor Preyer considers that the development of the power of using lan-
guage is the most prominent index to the unfolding of the intellect. He dif-
fers with Professor Max Mueller, however, on the question whether the op-
eration of thinking can be carried on without the use of words (see the recent
elaborate work of the latter on "The Science of Thought").
At my suggestion, the painstaking translator of this book has prepared a full
conspectus, showing the results of Professor Preyer's careful observations
in a chronological order, arranged by months. This considerable labor will
render the book more practical, inasmuch as it will enable each reader to see
at a glance the items of development of the child in the several departments
brought together in epochs. This makes it possible to institute comparative
observations under the guidance of Professor Preyer's method. I think that
I do not exaggerate the value of this conspectus when I say that it doubles
the value of the work to the reader.
WILLIAM T. HARRIS. CONCORD, MASS., November, 1888.
CONTENTS. PAGE
PREFACE BY THE EDITOR v
CONSPECTUS SHOWINGTHE PROGRESS OFTHE CHILD BYMONTHS
ix
THIRD PART.
DEVELOPMENT OF THE INTELLECT.
CHAPTER
XVI.-DEVELOPMENT OF THE CHILD'S INTELLECT INDEPEN-
DENT OF LANGUAGE 3
4 WILLIAM T. PREYER
XVII.-LEARNING TO SPEAK 33
1. Disturbances of Speech in Adults 34 (1) Periphero-Impressive or Percep-
tive Disturbances, 36. (2) Central Disturbances, 37. (3) Periphero-Expressive
or Articulatory Disturbances, 38.
2. The Organic Conditions of Learning to Speak 42
3. Parallel between the Disturbances of Speech in Adults and the Imperfec-
tions of Speech in the Child 45
I. Lalopathy, 47. A.The Impressive Peripheral Processes disturbed-Deafness,
47. B. The Central Processes disturbed-Dysphasia, 47. (1) The Sensory Pro-
cesses centrally disturbed, 47. (2) The Sensori-motor Processes of Diction
disturbed, 48. (3) The Motor Processes centrally disturbed, 49. C. The Ex-
pressive Peripheral Processes disturbed, 54. (1) Dyslalia and Alalia, 54. (2)
Literal Pararthria or Paralalia, 56. (3) Bradylalia, or Bradyarthria, 57. II. Dys-
phasia, 58. III. Dysmimia, 62.
4. Development of Speech in the Child 64
XVIII.-FIRST SOUNDSAND BEGINNINGS OF SPEECH INTHE CASE
OFA CHILD OBSERVED DAILY DURINGHIS FIRST THREE YEARS
99
XIX.-DEVELOPMENT OFTHE FEELING OF SELF, THE "I"-FEELING
5 WILLIAM T. PREYER
