Libet’s experiment: A complex replication

EEG data and introspective reports from the Libet׳s experiment replication

“…Consecutive sessions were performed about a week apart. The series were organized in the sessions so that the experimental conditions were properly rotated (see Section 2.5, Tables 1 and 2 in our main article [1] ). Altogether, seven sessions with each participant took place, while the first session was for training purposes only.…”

“…The spreadsheet Individual EEG presents averaged EEG plots for each series and electrode . There are also additional columns in the Individual EEG spreadsheet pertaining the readiness potential and P300 positivity (for more details on the RP types and methods of RP onset estimation, see Section 2.6 in the main article [1] ): RP type = type of the readiness potential detected using an eye-ball inspection (type I, II, III or pre-set) RP_MN = readiness potential onset detected using the eye-ball inspection (also called “main negative”, MN) RP_90%_bl <−1500;−1000> = readiness potential onset calculated using the RP 90% method with the baseline set as the mean voltage in the interval <−1500;−1000> RP_90%_bl <-2500;−1500> = readiness potential onset calculated using the RP 90% method with the baseline set as the mean voltage in the interval <−2500;−1500> P300 = if a P300 positivity was detected, 1 is stated in this column …”

“… Data source location Olomouc, Czech Republic (N49 ° 35 ′ 46.422 ″ , E17 ° 15 ′ 15.667″ ) Data accessibility Data is with this article. Related research article [1] T. Dominik, D. Dostál, M. Zielina, J. Šmahaj, Z. Sedláčková, R. Procházka, Libet׳s Experiment: A Complex Replication, Conscious Cogn. 65 (2018) 1–26.…”

“…Value of the data Original data from Libet׳s experiment [2] , [3] , [4] were presented as results only, which were not possible to re-analyze; our replication aims to publish authentic data sample. Alternative analysis procedures than those presented in our main article [1] may be applicable; data presented here allow other researchers to approach the analyses from different perspectives. Presented data may help other researchers to identify potential problems in methodology and data analysis procedures and avoid them in future Libet-style experiments.…”

“…Alternative analysis procedures than those presented in our main article [1] may be applicable; data presented here allow other researchers to approach the analyses from different perspectives.…”