Table 3 Estimated change in the difference between post-consolidation and pre-priming across treatments (tVNS—sham) for the fatigued/energized, calm/excited, and distracted/focused scales of the Mood Questionnaire.

From: Transcutaneous cervical vagus nerve stimulation enhances second-language vocabulary acquisition while simultaneously mitigating fatigue and promoting focus

Scale

Language

Session

Estimate

SE

Statistic

p-value

Fatigued/energized

Arabic

Sessions 2–4

0.313

0.149

2.103

0.036*

 

Farsi

Sessions 2–4

0.077

0.213

0.364

0.716

 

Mandarin

Sessions 2–4

0.106

0.140

0.758

0.449

 

Mandarin & Farsi

Sessions 2–4

0.092

0.127

0.721

0.471

Calm/Excited

Arabic

Sessions 2–4

0.204

0.169

1.205

0.228

 

Farsi

Sessions 2–4

-0.358

0.243

 − 1.471

0.141

 

Mandarin

Sessions 2–4

0.199

0.159

1.252

0.210

 

Mandarin & Farsi

Sessions 2–4

-0.079

0.145

 − 0.546

0.585

Distracted/Focused

Arabic

Sessions 2–4

0.421

0.129

3.271

0.001*

 

Farsi

Sessions 2–4

0.157

0.185

0.848

0.397

 

Mandarin

Sessions 2–4

0.080

0.121

0.663

0.507

 

Mandarin & Farsi

Sessions 2–4

0.119

0.111

1.072

0.283