Neuropharmacology
November 2, 2025
Luisa Prochazkova, Josephine Marschall, Michiel van Elk et al.
2 citations
BackgroundTaking very small doses of psychedelics (LSD, truffles) over an extended period became prevalent in Western societies for its alleged cognitive benefit, including enhanced creativity. However, in the absence of robust, double-blind-controlled quantitative studies, such claims remain anecdotal.MethodsHere we present results from 3 double-blind placebo-controlled longitudinal trials...
Neuropharmacology
October 17, 2025
Luisa Prochazkova, Josephine Marschall, Dominique P. Lippelt et al.
3 citations
ObjectiveMicrodosing psychedelics has been widely reported to enhance focus and problem-solving, sparking interest in its potential to treat attentional disorders such as ADHD. However, existing studies largely rely on anecdotal evidence and lack adequate placebo control.MethodsThis study contributes to the literature by examining the longitudinal effects of microdosing psilocybin truffles in...
Cerebral cortex (New York, N.Y. : 1991)
October 2, 2025
Weitao Zhang, Zsuzsika Sjoerds, Rebecca Mourits et al.
The neural mechanisms underlying the cognitive metacontrol states of persistence and flexibility are not yet fully understood but are thought to be modulated by frontal and striatal dopamine, respectively. In this study, we attempted to induce persistence and flexibility states by having participants engage in 2 creativity tasks (remote associates task and alternative uses task) and 2...
Psychonomic Bulletin & Review
October 1, 2024
Yingbing Sun, Ruiyu Zhu, Bernhard Hommel et al.
3 citations
Sense of ownership and agency are two important aspects of the minimal self, but how self-perception is affected by social conditions remains unclear. Here, we studied how social inclusion or exclusion of participants in the course of a virtual Cyberball game would affect explicit judgments and implicit measures of ownership and agency (proprioceptive drift, skin conductance responses, and...
Quarterly journal of experimental psychology (2006)
August 1, 2023
Ke Ma, Liping Yang, Bernhard Hommel
4 citations
People tend to perceive a virtual body standing in front of them as their own if it is either stroked or moving synchronously with their own real body-the out-of-body experience (OBE). We combined synchrony manipulation with two other factors of theoretical interest: the kind of stimulation, visuotactile stimuli or visuomotor correlations, being synchronised and the interoceptive accuracy (IA)...
June 14, 2021
Luisa Prochazkova, Michiel van Elk, Josephine Marschall et al.
4 citations
preprint
Introduction: Microdosing refers to the repetitive administration of tiny doses of psychedelics (LSD, Psilocybin) over an extended period of time. This practice has been linked to alleged cognitive benefits, such as improved mood and creativity, potentiated by targeting serotonergic 5-HT2A receptors and facilitating cognitive flexibility. Nonetheless, in the absence of robust, quantitative and...
Frontiers in Psychology
2021
Bernhard Hommel
7 citations
Numerous authors have taken it for granted that people represent themselves or even have something like "a self", but the underlying mechanisms remain a mystery. How do people represent themselves? Here I propose that they do so not any differently from how they represent other individuals, events, and objects: by binding codes representing the sensory consequences of being oneself into a...
2020
Luisa Prochazkova, Bernhard Hommel
Abstract Increasing evidence suggests that altered states of consciousness (ASC) are associated with both positive and negative effects on components of creative performance, and convergent and divergent thinking in particular. We provide a metacontrol framework that allows characterizing factors that induce ASC in terms of their general impact on the information processing style of problem...
Experimental psychology
November 1, 2018
Bernhard Hommel
44 citations
Human beings are assumed to own a concept of their self, but it remains a mystery how they represent themselves and others. I shall develop a theoretical framework, inspired by the Theory of Event Coding, of how people represent themselves and others, how and under which circumstances these two kinds of representations interact and what consequences this has. In a nutshell, I shall argue that...
Psychopharmacology
October 24, 2018
Luisa Prochazkova, Dominique P. Lippelt, Lorenza S. Colzato et al.
181 citations
While this study provides quantitative support for the cognitive-enhancing properties of microdosing psychedelics, future research has to confirm these preliminary findings in more rigorous placebo-controlled study designs. Based on these preliminary results, we speculate that psychedelics might affect cognitive metacontrol policies by optimizing the balance between cognitive persistence and...
Neuroscience and Biobehavioral Reviews
October 1, 2017
Bernhard Hommel, Lorenza S. Colzato
Humans often face binary cognitive-control dilemmas, with the choice between persistence and flexibility being a crucial one. Tackling these dilemmas requires metacontrol, i.e., the control of the current cognitive-control policy. As predicted from functional, psychometric, neuroscientific, and modeling approaches, interindividual variability in metacontrol biases towards persistence or...
Frontiers in Psychology
September 23, 2014
Dominique P. Lippelt, Bernhard Hommel, Lorenza S. Colzato
280 citations
Meditation is becoming increasingly popular as a topic for scientific research and theories on meditation are becoming ever more specific. We distinguish between what is called focused Attention meditation, open Monitoring meditation, and loving kindness (or compassion) meditation. Research suggests that these meditations have differential, dissociable effects on a wide range of cognitive...