Introduction of Introspection in Psychology

Throughout the history of psychology, numerous influential figures have contributed significantly to the establishment and development of psychological thought. One such figure is Wilhelm Wundt, who is often regarded as the 'father of modern psychology.' His emphasis on empirical methods and the establishment of the first psychological laboratory marked a critical shift towards a more scientific approach to psychology. However, several other contributors to the field have also left a lasting impact, albeit in different ways. In this context, consider the significance of the following individuals:

Which of the following psychologists is most accurately credited with introducing the concept of mental processes being studied through introspection?