Differential involvement of internal clock and working memory in the production and reproduction of duration: A study on older adults Alexia Baudouin a , Sandrine Vanneste a, * , Michel Isingrini a , Viviane Pouthas b a De ´partement de Psychologie, Universite ´ de Tours, 3 rue des Tanneurs, 37041 Tours, France b LENA CNRS UPR 640, Paris, France Received 21 September 2004; received in revised form 13 July 2005; accepted 13 July 2005 Available online 2 September 2005 Abstract The present study uses the inter-individual variability in time perception of a group of elderly participants to differentiate the processes underlying time production and time repro- duction. Participants performed duration production and reproduction tasks. They were also administered working memory tests and a spontaneous motor tempo task. The findings sug- gest that duration production and duration reproduction involve different mechanisms. Cor- relational analyses revealed a double dissociation: production was only correlated with spontaneous motor tempo and reproduction only with working memory measures. These find- ings suggest that the internal clock rate modulates the production of duration and that repro- duced duration varies according to working memory capacities. Ó 2005 Elsevier B.V. All rights reserved. PsycINFO classification: 2820; 2340 Keywords: Estimation of time; Aging; Internal clock; Working memory 0001-6918/$ - see front matter Ó 2005 Elsevier B.V. All rights reserved. doi:10.1016/j.actpsy.2005.07.004 * Corresponding author. Tel.: +33 2 473 66554. E-mail address: vanneste@univ-tours.fr (S. Vanneste). Acta Psychologica 121 (2006) 285–296 www.elsevier.com/locate/actpsy