The book "Harvard Psychological Research. Volume 1", containing sixteen experimental studies from the Harvard Psychological Laboratory, is a valuable source of knowledge for anyone interested in psychology. This publication presents the results of a number of unique experiments that allow us to consider various aspects of mental processes and phenomena. The authors and scientists who contributed to this collection worked with the latest methods and data processing technologies, making each experiment authentic and valuable to the scientific world. This book will be an important addition to the library of any student, scientist or simply curious person who has a desire to expand their knowledge in the field of psychology.