RT Journal Article T1 Is it possible to modify fear memories in humans with extinction training within a single day? A1 Redondo Lago, Jaime Mauro A1 Fernández Rey, José A1 González González, Daniel K1 Fear memomy K1 Extinction K1 Skin conductance response (SCR) AB Extinction procedures have been used widely in the study of fear memories, and different positions have been adopted regarding the efficacy of such procedures and the mechanisms involved. It has been argued that extinction may interfere with the consolidation of the fear memory if the procedure is applied with the appropriate timing after acquisition. However, the opposite position is also held, that is, that the extinction does not achieve an elimination of the fear response. The aim of the present study is to test the short-term effects of immediate extinction in fear reduction when this extinction is preceded by a retrieval trial. For this, a procedure similar to that employed by Schiller et al. (Nature 463(7277): 49–53, 2010) was used, but in a single day and with white noise as an aversive unconditioned stimulus. The results indicate that a CS+ single retrieval trial before the extinction procedure after acquisition was more effective in fear reduction than standard immediate extinction. PB Springer Nature SN 0340-0727 YR 2019 FD 2019 LK http://hdl.handle.net/10347/34711 UL http://hdl.handle.net/10347/34711 LA eng NO Redondo, J., Fernandez-Rey, J. & Gonzalez-Gonzalez, D. Is it possible to modify fear memories in humans with extinction training within a single day?. Psychological Research 83, 1340–1348 (2019) NO This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/s00426-018-1017-4 NO This study was supported by the Autonomous Government of Galicia (Grant GRC2015/006) DS Minerva RD 27 abr 2026