11 research outputs found
Effects of GM potato Modena on soil microbial activity and litter decomposition fall within the range of effects found for two conventional cultivars
A distinct subset of intestinal dendritic cells responds selectively to oral TLR7/8 stimulation
A distinct subset of intestinal dendritic cells responds selectively to oral TLR7/8 stimulation
Cross-evidence for hypnotic susceptibility through nonlinear measures on EEGs of non-hypnotized subjects
Magical Thinking in Somatoform Disorders: An Exploratory Study among Patients with Suspected Allergies
Placebo-Suggestion Modulates Conflict Resolution in the Stroop Task
<div><p>Here, we ask whether placebo-suggestion (without any form of hypnotic induction) can modulate the resolution of cognitive conflict. Naïve participants performed a Stroop Task while wearing an EEG cap described as a “brain wave” machine. In Experiment 1, participants were made to believe that the EEG cap would either enhance or decrease their color perception and performance on the Stroop task. In Experiment 2, participants were explicitly asked to <i>imagine</i> that their color perception and performance would be enhanced or decreased (non-hypnotic imaginative suggestion). We observed effects of placebo-suggestion on Stroop interference on accuracy: interference was decreased with positive suggestion and increased with negative suggestion compared to baseline. Intra-individual variability was also increased under negative suggestion compared to baseline. Compliance with the instruction to imagine a modulation of performance, on the other hand, did not influence accuracy and only had a negative impact on response latencies and on intra-individual variability, especially in the congruent condition of the Stroop Task. Taken together, these results demonstrate that expectations induced by a placebo-suggestion can modulate our ability to resolve cognitive conflict, either facilitating or impairing response accuracy depending on the suggestion’s contents. Our results also demonstrate a dissociation between placebo-suggestion and non-hypnotic imaginative suggestion.</p> </div