inherited mechanismsimportant for the regulation of biologicalrhythms, particularly in the absence of external cues. The principal endogenouspacemaker in mammals is a small group of cells in the hypothalamus,known as the suprachiasmatic nucleus (SCN), which regulates the productionof melatonin in the pineal gland.
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.