Abstract
Empiricism had dominated scientific activities for about three centuries but beginning with the 20th Century a new philosophy, phenomenology, began to develop and certain scientists who conducted research with humans began to turn to phenomenology as the basis for their scientific work rather than empiricism. What was known as the Utrecht School in Holland just after World War II, psychologists at Duquesne University during mid-twentieth century, pedagogists in Canada at about the same time and nurses later in the twentieth century all began to base their research on phenomenological philosophical principles rather than on empiricism. Certain philosophers criticized the approach of these scientists and offered their own praxis based directly on phenomenological philosophy. However, one of the members of the Duquesne University’s group strongly criticized the evaluation of his approach by the philosophers and demonstrated the significant errors of their criticism. The psychologist then clarified his scientific phenomenological approach toward psychological phenomena and emphasized the role of the phenomenological epoche’ and reduction for Husserlian scientific phenomenology.