Transcranial direct current stimulation over the left anterior temporal lobe during memory retrieval differentially affects true and false recognition in the DRM task

Transcranial direct current stimulation (tDCS) is a form of non-invasive brain stimulation that has been used to modulate human brain activity and cognition. One area which has not yet been extensively explored using tDCS is the generation of false memories. In this study, we combined the Deese-Roediger-McDermott (DRM) task with stimulation of the left anterior temporal lobe (ATL) during retrieval. This area has been shown to be involved in semantic processing in general and retrieval of false memories in the DRM paradigm in particular. During stimulation, 0.7 mA were applied via a 9 cm² electrode over the left ATL, with the 35 cm² return electrode placed over the left deltoid. We contrasted the effects of cathodal, anodal, and sham stimulation, which were applied in the recognition phase of the experiment on a sample of 78 volunteers. Results showed impaired recognition of true memories after both anodal and cathodal stimulation in comparison to sham stimulation, suggesting a reduced signal-to-noise ratio. In addition, the results revealed enhanced false recognition of concept lure items during cathodal stimulation compared to anodal stimulation, indicating a polarity-dependent impact of tDCS on false memories in the DRM task. The pathway by which tDCS modulated false recognition remains unclear: stimulation may have changed the activation of irrelevant lures or affected the weighting and monitoring of lure activations. Nevertheless, these results are a first step towards using brain stimulation to decrease false memories. Practical implications of the findings for real-life settings, for example, in the courtroom, need to be addressed in future work

Immediate interviewing increases children's suggestibility in the short term, but not in the long term

© 2018 The British Psychological Society Purpose: Children sometimes receive misinformation after being formally interviewed about their experiences in cases of suspected abuse. Following decades of research, many guidelines have been produced for interviewers so they can obtain reliable statements in children, like, for example, the NICHD protocol. One might expect that completing an early interview following research-based guidelines might guard against the incorporation of misinformation encountered later. The goal of the current experiments was to examine whether following research-based guidelines such as the NICHD protocol might protect child witnesses against follow-up ‘misinformation’ or make them more vulnerable to misinformation. This increased vulnerability to misinformation has been referred to as retrieval-enhanced suggestibility. Methods: In two experiments, children viewed a video and half of them were interviewed using the NICHD protocol, while the other half were not interviewed. The children received misinformation and a final memory test either immediately after being interviewed (Experiment 1) or 1 week later (Experiment 2). Results: Retrieval-enhanced suggestibility was observed when misinformation was presented immediately but not when it was provided after 1 week. Conclusions: The current experiments indicate that a well-established interview protocol can, under some circumstances, amplify levels of suggestibility in children.status: publishe

Comparing the effects of generating questions, testing, and restudying on students' long‐term recall in university learning

Gefördert im Rahmen des Projekts DEA