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 t_{sum} = −55,635 | p_{corr} = 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 t_{sum} = −287,990 | p_{corr} = 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. p_{corr} = 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 T_{sum} = −158380 | p_{corr} = 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 t_{sum} = −75.85 | p_{corr} = 0.004 |

Topoplot: SME alpha/beta, 15–30 Hz, 1–3 s | 1D cluster permutation statistic | Two sig. pos. clusters t_{sum} = 29.60 and 19.34 | p_{corr} = 0.012, p_{corr} = 0.042 | |

Topoplot: condition difference theta 3–7 Hz, −1 to 3 s | 1D cluster permutation statistic | One sig. neg. cluster t_{sum} = −239.30 | p_{corr} = 0.002 | |

Topoplot: condition difference alpha/beta, 10–15 Hz, 1–3 s | 1D cluster permutation statistic | One sig. pos. cluster t_{sum} = 104.43 | p_{corr} = 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. p_{corr} = 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 t_{sum} = −246.33 | p_{corr} = 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 T_{sum} = −588.36 and −562.18 | p_{corr} = 0.006, p_{corr} = 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 t_{sum} = −682.99 and −516.30 | p_{corr} = 0.002, p_{corr} = 0.004 | |

Results: EEG source analysis and Figure 6 | ||||

Source statistic: SME theta | 1D cluster permutation statistic | One sig. neg. cluster t_{sum} = −3140.3 | p_{corr} = 0.003 | |

Sourcestatistic: SME alpha/beta | 1D cluster permutation statistic | One sig. pos. cluster t_{sum} = 433.72 | p_{corr} = 0.054 | |

Sourcestatistic: condition difference alpha/beta | 1D cluster permutation statistic | One sig. pos. cluster t_{sum} = 2692.8 | p_{corr} = 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.