Originally published in German in 1923, this English edition was first published in 1931. From the translators preface: "e;Experimentelle Psychologie is characterized by an excellent summarizing of the most recent experimental data and by a spirit of fairness which it exhibits in organizing facts under general theoretical principles. Besides informing the reader, it stimulates him by critical remarks and suggestions for further thinking and experimentation."e; Today it can be read and enjoyed in its historical context.

Originally published in German in 1923, this English edition was first published in 1931. From the translators preface: "Experimentelle Psychologie is characterized by an excellent summarizing of the most recent experimental data and by a spirit of fairness which it exhibits in organizing facts under general theoretical principles. Besides informing the reader, it stimulates him by critical remarks and suggestions for further thinking and experimentation."