Working memory DLPFC confound
A recurring problem in the interpretation of neuroimaging studies of time perception is that activation seen during timing tasks may be related to cognitive functions other than pure timing functions. Consider, for example, the case of the DLPFC. Working memory has been linked to the DLPFC (e.g. MacDonald, Cohen, Stenger, & Carter, 2000) and the possibility of working memory components being involved in timing tasks is plausible. But not all researchers take this view. Zakay and Block (1996), Rubia et al. (1998) amongst others argue for a more primary role for the DLPFC in the time estimation process. Smith, Taylor, Lidzba, & Rubia, 2003 specifically investigated the role of the DLPFC and also concluded that it may play a more central and specific role in time processing than simply providing working memory.