Abraham Maslow (1908-1970) was a leading psychologist whose hierarchy of
needs has resonated throughout various disciplines. The pinnacle of
Maslow's hierarchy was self-actualisation, characterised by the peak
experience. However there are a series of definitional, theoretical and
methodological issues related to the hierarchy and self-actualisation.
Maslow specifically refuted his own theory, instead suggesting that
research should be directed towards self-transcendence as characterised
by the plateau experience. To date, the plateau experience has remained
obscure. This book explores the problematic nature of self-
actualisation and the relationship between peak experiences and flow,
before progressing to analyse Maslow's composite musings about the
plateau experience. From this, a number of defining characteristics are
identified, which subsequently inform the development of a psychometric,
the Plateau Experience measure (or PLEX). The PLEX has demonstrated
secure psychometric properties and is offered as a resource to
investigate the plateau experience further.