Lower pre-training performance predicted greater training gains, and tDCS broke the "less room for change" pattern in task-related EEG responses¶

Claim · All claims
Evidence · 1 study (2 entries) · causal r2 · q2
Currency · newest study 2023 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? Behavioral improvements were negatively correlated with pre-training d-primes and RTs: those with lower pre-training performance showed greater gains. → Yufeng Ke 2023 q2 i? For EEG dynamics, sham-group changes were strongly negatively associated with baseline while active-group associations were not significant, a group difference indicating tDCS broke the "less room for change" effect. → Yufeng Ke 2023 (2)

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

q2 · i? · causal · r2

Pearson correlation analyses of behavioral baseline-change relations, reported as significant in all conditions except the sham group's 4-back d-prime improvement (ps < 0.05), in the randomized trial of 34 participants.

"individual differences in both groups in the magnitude of improvements in d-primes and reaction times at post-tests were negatively correlated with pre-training d-primes and RTs in both tasks: those with lower pre-training performance levels showed greater performance gains."

Yufeng Ke 2023 (2)¶

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

q2 · i? · causal · r2

Correlation analyses with Fisher's Z-tests on task-related EEG dynamics found significant group differences in baseline-change associations for theta, alpha, gamma power, and P300 GFP in the 6-back task, reported in the Discussion.

"where group differences were found, changes in the sham group were strongly negatively associated with baseline, while associa- tions in the active group were not significant."

Discussion¶

Related Claims¶

• HD-tDCS facilitated and enhanced training-induced increases in frontal task-related theta, alpha, beta, and gamma power — related
• Reaction times decreased with working memory training but were not additionally affected by tDCS — related
• Anodal HD-tDCS over left dlPFC during multi-session working memory training yields larger d-prime improvements than sham that persist three weeks — related