the process of gaining knowledge, either by an examination of appropriate theories orthrough empirical data. In psychology,the term is used to refer to an investigative process such as the experiment orthe casestudy.
was one ofthe original founders of the humanistic perspective. His theories encompassedthe importance of unconditional and conditional positive regard in development of the 'selfconcept' and 'conditions of worth' set by others. His work has been applied to a rangeof domains, particularly in therapy through his development of'client-centred'(now class="d-title" named 'person-centred'therapy.