The tVNS-easy group's performance falls outside the normal range of individual learning variability observed across 678 comparable unstimulated learners¶

Claim · All claims
Evidence · 1 study · causal r2 · q2
Currency · newest study 2020 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? Monte Carlo sampling from the Aggregate dataset showed tVNS-hard and Control performance was well represented (p = 0.46 and 0.51) while tVNS-easy performance was not (p = 0.019). → Llanos 2020

Evidence¶

Llanos 2020¶

Llanos, F., McHaney, J. R., Schuerman, W. L., Yi, H. G., Leonard, M. K. and Chandrasekaran, B. (2020). Non-invasive peripheral nerve stimulation selectively enhances speech category learning in adults. npj Science of Learning. https://doi.org/10.1038/s41539-020-0070-0

q2 · i? · causal · r2

Non-parametric Monte Carlo analysis sampling one thousand twelve-subject sub-populations from the Aggregate dataset of 678 prior learners, using each proportion as a p-value. The tVNS-easy group's improvement was outside normal variability; the other groups were within it.

"While the performances of the tVNS-hard and Control groups were well represented in the Aggregate dataset ( p = 0.46 and 0.51, respectively), the performance of the tVNS-easy was not ( p = 0.019; Fig. 2c)."

Discussion¶

Related Claims¶

• Sub-perceptual-threshold tVNS evokes brainstem vagal potentials consistent with peripheral nerve engagement, and the pulse-evoked response follows an inverted-U function of stimulation intensity — related
• Pairing sub-perceptual tVNS with easier-to-learn Mandarin tone categories improves trial-by-trial speech category learning faster than training alone, and the enhancement is specific to the stimulated categories — related
• tVNS-enhanced speech category learning generalizes to new talkers' exemplars without accompanying stimulation or feedback — related
• tVNS paired with easier-to-learn categories increases retention of correct stimulus-response associations between training blocks — related
• Pairing tVNS with feedback after correct responses does not enhance speech category learning, suggesting the enhancement is not driven by a reward signal — related