Scientific Reports
December 5, 2017
Sakari Kallio, Mika Koivisto, Johanna K. Kaakinen
10 citations
Are synaesthetic experiences congenital and so hard-wired, or can a functional analogue be created? We induced an equivalent of form-colour synaesthesia using hypnotic suggestions in which symbols in an array (circles, crosses, squares) were suggested always to have a certain colour. In a Stroop type-naming task, three of the four highly hypnotizable participants showed a strong...
International Journal of Clinical and Experimental Hypnosis
April 2011
Levente Móró, Valdas Noreika, Antti Revonsuo et al.
The relationships between hypnotizability, sleepiness, and the subjective experience of hypnotic suggestions were investigated in 90 participants. Scores from the Harvard Group Scale of Hypnotic Susceptibility Form A (HGSHS:A), the Karolinska Sleepiness Scale (KSS), the Epworth Sleepiness Scale (ESS), the Pittsburgh Sleep Quality Index (PSQI), and our self-developed Questionnaire on Subjective...
PLoS One
2011
Sakari Kallio, Jukka Hyönä, Antti Revonsuo et al.
Hypnosis has had a long and controversial history in psychology, psychiatry and neurology, but the basic nature of hypnotic phenomena still remains unclear. Different theoretical approaches disagree as to whether or not hypnosis may involve an altered mental state. So far, a hypnotic state has never been convincingly demonstrated, if the criteria for the state are that it involves some...
A Phenomenological Inquiry into the North American Shaman's Experience of the Altered State of Consciousness
April 1, 2009
Antti Revonsuo, Sakari Kallio, Pilleriin Sikka
“Altered State of Consciousness” (ASC) has been defined as a changed overall pattern of conscious experience, or as the subjective feeling and explicit recognition that one's own subjective experience has changed. We argue that these traditional definitions fail to draw a clear line between altered and normal states of consciousness (NSC). We outline a new definition of ASC and argue that the...
Contemporary Hypnosis
September 1, 2003
Sakari Kallio, Antti Revonsuo
133 citations
Abstract There is currently agreement that, in addition to the changes in external behaviour, suggestions presented in a hypnotic context may give rise to changes in subjective experience. Yet, there is no general agreement about the theoretical framework within which these changes in experience should be explained. Though different theories about hypnosis overlap in many respects, there is...