Random 0.76–1.19 s pre-word blanks did not change recall or band power in 47 FR1 SEEG patients

The FR1 task program sets the blank before each word at random. We used this jitter as a small randomized manipulation. In 47 subjects (11176 words), we removed serial position and list and calculated partial correlations per subject. The blank did not predict recall (mean r +0.003, 95% CI -0.015 to +0.021), all-pair HFA (+0.004, -0.019 to +0.027) or theta (+0.002, -0.018 to +0.022); all Holm p = 1.0. The blank did not correlate with serial position. In the same data, recall vs theta was r -0.028, thus the CI bound is about the size of the known memory effect. The result applies only to this narrow jitter range. FR1 encoding studies need not control the blank jitter. The plan was hashed before the analysis.

delayed free recall · SEEG · intracranial EEG · pre-word interval · band power · memory encoding · FR1