This book looks at multiple personality through the lens of individuality. Each part deals with a specific aspect of multiple personality: personality, double personality, and finally, consciousness and multiple personality. The work of Parts I and III covers a period of eight years. Out of the material accumulated by Dr. Sidis and his collaborators, some experiments and observations of functional psychopathic cases have been utilized in the last part of this volume. The authors note that the case of double personality described in Part II is of great interest and is specially recommended to the reader’s attention. This case was investigated in the Pathological Institute of the New York State Hospitals.
Here is a link to the table of contents http://www.sidis.net/mpcontents.htm
Excerpt from wikipedia
Boris Sidis, Ph.D., M.D. October 12, 1867 – October 24, 1923) was a Ukrainian psychologist, physician, psychiatrist, and philosopher of education. Sidis founded the New York State Psychopathic Institute and the Journal of Abnormal Psychology. Boris Sidis eventually opposed mainstream psychology and Sigmund Freud, and thereby died ostracized.
From Google Books:
S. P. GOODHART, PH.B., M.D. Assistant Professor of Neurology, Columbia University Neurologist to the Montefiore Hospital NEW YORK CITY, USA
I am finding old, old articles that refer to multiple personalities as “functional psychosis”. Unfortunately, this book is out of print and no longer a print-on-demand. Maybe one of you will get lucky and find it. JB