Table 2 Retention Model Results (Sessions 4 to 5).

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

Model

Fixed effects

Estimate

SE

z-value

p-value

Mandarin recall

(Intercept)

2.441

0.491

4.966

 < 0.001*

 

Session

0.061

0.099

0.612

0.541

 

Treatment

 − 0.237

0.644

 − 0.368

0.713

 

Session × treatment

0.021

0.138

0.150

0.881

Arabic recall

(Intercept)

0.662

0.540

1.224

0.221

 

Session

0.115

0.095

1.213

0.225

 

Treatment

0.542

0.726

0.747

0.455

 

Session × treatment

0.030

0.133

0.227

0.821

Mandarin recognition RT

(Intercept)

7.117

0.060

119.170

 < 0.001*

Session

 − 0.081

0.031

 − 2.631

0.009*

 

Treatment

 − 0.043

0.081

 − 0.531

0.596

 

Session × treatment

0.044

0.043

1.008

0.313

Arabic recognition RT

(Intercept)

7.150

0.058

124.208

 < 0.001*

Session

 − 0.050

0.017

 − 2.869

0.004*

 

Treatment

 − 0.028

0.078

 − 0.360

0.719

 

Session × treatment

 − 0.012

0.024

 − 0.486

0.627

  1. Estimates refers to unstandardized regression weights.
  2. Final random effects (Mandarin, Arabic Recall): (1 | Participant) + (Treatment | Item).
  3. Final random effects (Mandarin Recognition RT): (Session | Participant) + (Session | Item).
  4. Final random effects (Arabic Recognition RT): (Session | Participant) + (Treatment | Item).
  5. n obs = 8200, n items = 100, n participants = 41 for Mandarin Recall model.
  6. n obs = 7200, n items = 100, n participants = 36 for Arabic Recall model.
  7. n obs = 7709, n items = 100, n participants = 40 for Mandarin Recognition RT model.
  8. n obs = 6054, n items = 100, n participants = 36 for Arabic Recognition RT model.
Back to article page