Anodal HD-tDCS over left dlPFC during multi-session working memory training yields larger d-prime improvements than sham that persist three weeks¶

Claim · All claims
Evidence · 1 study · causal r2 · q3
Currency · newest study 2023 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i? Active tDCS plus working memory training produced higher post-training d-primes than sham, with no significant group-by-time interaction. → Yufeng Ke 2023 q3 i? Baseline d-primes were statistically equivalent between groups, making the post-training advantage unlikely to reflect more room to improve. → Yufeng Ke 2023

Evidence¶

Yufeng Ke 2023¶

Yufeng Ke, Shuang Liu, Long Chen, Xiashuang Wang and Dong Ming. (2023). Lasting enhancements in neural efficiency by multi-session transcranial direct current stimulation during working memory training. npj Science of Learning 8:48. https://doi.org/10.1038/s41539-023-00200-y

q3 · i? · causal · r2

Mixed ANCOVAs on 4- and 6-back d-primes at Post1 and Post21 in a randomized active-versus-sham HD-tDCS design (N = 34) showed significant group main effects (e.g., 4-back p = 0.002, η2p = 0.261) while "the main effects of time and the group-by-time interaction effects in both tasks were non-significant".

"these group differences were significant after training with higher levels of d-primes in the active group, compared to the sham group. Given that the two groups displayed the same level of performance in d-prime prior to training, it is less likely that higher levels of d-prime at Post-tests in the active group are associated with "more room to improve.""

Discussion¶

Related Claims¶

• HD-tDCS combined with mental rotation training shows no significant group effect or Group × Time interaction on accuracy, response time, or P300 GFP — related
• The active group improved faster during training, reaching a capacity plateau after six days, while the sham group rose more slowly — related
• Active tDCS induced lasting P300 GFP increases that emerged three weeks after training in the active group only — related
• HD-tDCS facilitated and enhanced training-induced increases in frontal task-related theta, alpha, beta, and gamma power — related
• Lower pre-training performance predicted greater training gains, and tDCS broke the \"less room for change\" pattern in task-related EEG responses — related
• Reaction times decreased with working memory training but were not additionally affected by tDCS — related
• Validation analyses find no generally reduced neural activity after mnemonic training, with increased alpha power uncorrelated with memory gains — related
• Alpha neurofeedback training improves visual working memory capacity measured by the Corsi-block tapping task, with an effect lasting seven days after training ends — related