Table 2.
LMM results for all fixed factors and covariates
| LMM Fixed effects and Covariates n = 29 | |||||||||||||
| Test type | Visit | Session | Visit*Session | Motivation | |||||||||
| Model | df | F statistic | p value | df | F statistic | p value | df | F statistic | p value | df | F statistic | p value | |
| Cognitive: | |||||||||||||
| Immediate recall score (correct/15) | 1 | F(2,54.20) | 16.82 | <.001 | F(1,79.39) | 0.02 | 0.881 | F(2,81.91) | 4.36 | 0.016 | F(1,136.77) | 13.56 | <0.001 |
| 2 | F(2,54.00) | 15.91 | <0.001 | F(1,69.62) | 1.83 | 0.181 | F(2,82.13) | 2.92 | 0.059 | n/a | n/a | n/a | |
| Delayed recall score (correct/15) | 1 | F(2,53.22) | 2.79 | 0.070 | F(1,71.43) | 17.08 | <0.001 | F(2,65.15) | 2.13 | 0.127 | F(1,127.22) | 7.64 | 0.007 |
| 2 | F(2,55.09) | 2.87 | 0.065 | F(1,72.68) | 19.20 | <0.001 | F(2,67.28) | 2.03 | 0.140 | n/a | n/a | n/a | |
| Serial 3s score (correct in 2 mins) | 1 | F(2,49.95) | 70.48 | <0.001 | F(1,76.87) | 42.98 | <0.001 | F(2,76.20) | 3.87 | 0.025 | F(1,155.27) | 1.92 | 0.168 |
| 2 | F(5,51.08) | 72.00 | <0.001 | F(1,74.78) | 41.29 | <0.001 | F(2,74.32) | 4.39 | 0.016 | n/a | n/a | n/a | |
| Serial 3s RT (ms) | 1 | F(2,53.89) | 35.30 | <0.001 | F(1,86.05) | 16.59 | <0.001 | F(2,50.31) | 1.45 | 0.243 | F(1,118.84) | 2.85 | 0.094 |
| 2 | F(2,53.86) | 33.98 | <0.001 | F(1,84.73) | 16.13 | <0.001 | F(2,47.79) | 1.98 | 0.149 | n/a | n/a | n/a | |
| Serial 7s score (correct in 2 mins) | 1 | F(2,46.26) | 32.86 | <0.001 | F(1,69.02) | 10.74 | 0.002 | F(2,71.52) | 0.71 | 0.496 | F(1,135.85) | 19.05 | <0.001 |
| 2 | F(2,48.54) | 26.88 | <0.001 | F(1,57.88) | 9.13 | 0.004 | F(2,67.26) | 0.37 | 0.690 | n/a | n/a | n/a | |
| Serial 7s RT (ms) | 1 | F(2,66.14) | 11.43 | <0.001 | F(1,67.33) | 17.04 | <0.001 | F(2,73.47) | 4.39 | 0.016 | F(1,124.54) | 0.05 | 0.825 |
| 2 | F(2,66.09) | 11.37 | <0.001 | F(1,67.10) | 17.01 | <0.001 | F(2,73.84) | 4.39 | 0.016 | n/a | n/a | n/a | |
| Sternberg scanning rate (ms/item) | 1 | F(2,60.89) | 6.87 | 0.002 | F(1,58.29) | 0.07 | 0.789 | F(2,71.51) | 0.25 | 0.777 | F(1,130.19) | 1.37 | 0.243 |
| 2 | F(2,60.33) | 7.08 | 0.002 | F(1,58.80) | 0.10 | 0.754 | F(2,70.08) | 0.26 | 0.774 | n/a | n/a | n/a | |
| Sternberg RT (ms) | 1 | F(2,60.23) | 2.82 | 0.067 | F(1,55.60) | 9.37 | 0.003 | F(2,71.45) | 1.06 | 0.351 | F(1,128.73) | 3.60 | 0.060 |
| 2 | F(2,60.81) | 2.80 | 0.069 | F(1,56.18) | 8.80 | 0.004 | F(2,71.12) | 1.13 | 0.328 | n/a | n/a | n/a | |
| Stroop incongruent RT (ms) | 1 | F(2,52.41) | 13.62 | <0.001 | F(1,57.19) | 24.57 | <0.001 | F(2,74.68) | 8.70 | <0.001 | F(1,140.55) | 3.24 | 0.074 |
| 2 | F(2,52.04) | 12.66 | <0.001 | F(1,58.63) | 23.75 | <0.001 | F(2,74.99) | 8.91 | <0.001 | n/a | n/a | n/a | |
| Stroop congruent RT (ms) | 1 | F(2,43.04) | 6.65 | 0.003 | F(1,42.89) | 50.08 | <0.001 | F(2,83.05) | 3.52 | 0.034 | F(1,140.24) | 5.82 | 0.017 |
| 2 | F(2,48.90) | 6.17 | 0.004 | F(1,47.64) | 44.81 | <0.001 | F(2,83.96) | 3.45 | 0.036 | n/a | n/a | n/a | |
| Stroop interference effect (ms) | 1 | F(2,55.57) | 0.29 | 0.748 | F(1,61.19) | 6.50 | 0.013 | F(2,84.16) | 2.40 | 0.097 | F(1,145.5) | 3.19 | 0.076 |
| 2 | F(2,55.68) | 0.32 | 0.729 | F(1,58.75) | 5.51 | 0.022 | F(2,84.38) | 2.29 | 0.108 | n/a | n/a | n/a | |
| Mood: | |||||||||||||
| Mental fatigue (rating/9) | 2 | F(2,58.82) | 5.18 | 0.008 | F(1,69.09) | 7.24 | 0.009 | F(2,83.19) | 0.52 | 0.599 | n/a | n/a | n/a |
| Positive affect (score/50) | 2 | F(2,53.70) | 5.18 | 0.009 | F(1,61.90) | 13.24 | 0.001 | F(2,71.46) | 3.13 | 0.050 | n/a | n/a | n/a |
| Negative affect (score/50) | 2 | F(2,75.48) | 0.31 | 0.737 | F(1,58.12) | 2.69 | 0.107 | F(2,54.22) | 0.40 | 0.673 | n/a | n/a | n/a |
Motivation is included as a repeated covariate in Model 1, but is omitted in Model 2.