Table 3:
Statistical table
| Figure/section | Description/data structure | Test | Statistical value | p value |
|---|---|---|---|---|
| Behavioral analysis | ||||
| Methods: task design | Number of trials remembered out of sequence in EEG: average of out of sequence trials spatial vs nonspatial | Paired t test | t(20) = 0.4 | 0.68 |
| Number of trials remembered out of sequence in fMRI average of out of sequence trials spatial vs nonspatial | Paired t test | t(22) = −0.168 | 0. 87 | |
| Results: Behavioral Performance and Figure 2 | Memory performance EEG: relative number of remembered items spatial vs nonspatial | Paired t test | t(20) = 10.23 | 0.0001 |
| Memory performance fMRI: relative number of remembered items spatial vs nonspatial | Paired t test | t(22) = 6.26 | 0.0001 | |
| EEG analysis | ||||
| Results: EEG scalp level and Figure 3A | FOI analysis theta band: SME: forgotten vs remembered trials, 1–10 Hz, −1 to 3 s | 3D cluster permutation statistic | One sig. neg. cluster tsum = −55,635 | pcorr = 0.03 |
| FOI analysis Theta band: condition difference, spatial vs Nonspatial, 1–10 Hz, −1 to 3 s | 3D cluster permutation statistic | One sig. neg. cluster tsum = −287,990 | pcorr = 0.002 | |
| FOI analysis Theta band: Interaction SME spatial vs SME nonspatial, 1–10 Hz, −1 to 3 s | 3D cluster permutation statistic | no sig. cluster | Min. pcorr = 0.68 | |
| FOI analysis theta band: spatial remembered vs nonspatial remembered, 1–10 Hz, −1 to 3 s | 3D cluster permutation statistic | One sig. neg. cluster Tsum = −158380 | pcorr = 0.002 | |
| Results: EEG scalp level and Figure 3B | SME: forgotten vs remembered trials, 1–30 Hz, −1 to 3 s | Sliding cluster permutation statistic | Coherent sig. bins in alpha/beta band | |
| Condition difference: spatial vs nonspatial, 1–30 Hz, −1 to 3 s | Sliding cluster permutation statistic | Coherent sig. bins in alpha/beta band | ||
| Interaction: SME spatial vs SME nonspatial, 1–30 Hz, −1 to 3 s | Sliding cluster permutation statistic | no coherent sig. bins (min. 3 time × 4 frequency bins) | ||
| Results: EEG scalp level and Figure 3C | Topoplot: SME theta, 3–7 Hz, 0.5–3 s | 1D cluster permutation statistic | One sig. neg. cluster tsum = −75.85 | pcorr = 0.004 |
| Topoplot: SME alpha/beta, 15–30 Hz, 1–3 s | 1D cluster permutation statistic | Two sig. pos. clusters tsum = 29.60 and 19.34 | pcorr = 0.012, pcorr = 0.042 | |
| Topoplot: condition difference theta 3–7 Hz, −1 to 3 s | 1D cluster permutation statistic | One sig. neg. cluster tsum = −239.30 | pcorr = 0.002 | |
| Topoplot: condition difference alpha/beta, 10–15 Hz, 1–3 s | 1D cluster permutation statistic | One sig. pos. cluster tsum = 104.43 | pcorr = 0.012 | |
| Results: EEG source analysis and Figure 5 | Virtual electrode statistic: SME theta in right MTL, 2–10 Hz, −1 to 3 s | 1D cluster permutation statistic | No sig. cluster | Min. pcorr = 0.20 |
| Virtual electrode statistic: SME theta in left MTL, 2–10 Hz, −1 to 3 s | 1D cluster permutation statistic | One sig. neg. cluster tsum = −246.33 | pcorr = 0.014 | |
| Virtual electrode statistic: condition difference in right MTL, 2–10 Hz, −1 to 3 s | 1D cluster permutation statistic | Two sig. neg. clusters Tsum = −588.36 and −562.18 | pcorr = 0.006, pcorr = 0.006 | |
| Virtual electrode statistic: condition difference in left MTL, 2–10 Hz, −1 to 3 s | 1D cluster permutation statistic | Two sig. neg. clusters tsum = −682.99 and −516.30 | pcorr = 0.002, pcorr = 0.004 | |
| Results: EEG source analysis and Figure 6 | ||||
| Source statistic: SME theta | 1D cluster permutation statistic | One sig. neg. cluster tsum = −3140.3 | pcorr = 0.003 | |
| Sourcestatistic: SME alpha/beta | 1D cluster permutation statistic | One sig. pos. cluster tsum = 433.72 | pcorr = 0.054 | |
| Sourcestatistic: condition difference alpha/beta | 1D cluster permutation statistic | One sig. pos. cluster tsum = 2692.8 | pcorr = 0.0034 | |
| EEG and fMRI ROI analysis | ||||
| Results: EEG source analysis and Figure 7 | SME: forgotten vs remembered, average theta power MTL 3–7 Hz, −1 to 3 s | 2 × 2 ANOVA, main effect | F(1,20) = 10.08 | 0.005 |
| condition difference: spatial vs nonspatial, average theta power lMTL 3–7 Hz, −1 to 3 s | 2 × 2 ANOVA, main effect | F(1,20) = 43.87 | <0.0001 | |
| Interaction: SME spatial vs SME nonspatial, average theta power lMTL 3–7 Hz, −1 to 3 s | 2 × 2 ANOVA, interaction effect | F(1,20) = 0.001 | 0.97 | |
| Results: EEG source analysis and Figure 7 | SME: forgotten vs remembered, average beta weights MTL | 2 × 2 ANOVA, main effect | F(1,22) = 10.20 | 0.004 |
| condition difference: spatial vs nonspatial, average beta weights MTL | 2 × 2 ANOVA, main effect | F(1,22) = 16.23 | 0.001 | |
| Interaction: SME spatial vs SME nonspatial average beta weights MTL | 2 × 2 ANOVA, interaction effect | F(1,22) = 2.84 | 0.13 | |
Min., Minimum; neg., negative; pos., positive; sig., significant.