Figure 6.
Replay of stimulus-specific activity correlates with memory performance. A, Illustrative scatter plot for one participant of the relationship between the number of classifier votes for a given stimulus and the distance to target during memory recall for the respective stimulus. Right, Fisher-z-transformed correlation coefficients between stimulus-wise error during behavioral recall and stimulus-wise number of classifier votes for objects from the first memory task (orange) and the second memory task (blue). B, Fisher-z-transformed Spearman's correlation coefficients for objects from the first memory task (orange) and objects from the second memory task (blue) across different phases of the experiment, including waking state, S1, S2, SWS (S3 + 4) and rapid eye movement sleep (REM). Combined resting period (CRP) includes all resting periods following presentation of the first memory task, i.e., all resting periods where replay is possible. Fisher-z-transformed correlation coefficients were tested for consistent negativity across subjects with a one-sided t test against zero. Stars indicate phases in which there was significant consistent negativity (puncorr < 0.05; in CRP, no correction for multiple comparisons was applied). There was no consistent negativity in any phases for correlations involving objects from the second memory task.