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."

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." Today it can be read and enjoyed in its historical context.