Dimensional Overlap Modules Of Cognitive Control Network

According to the dimensional overlap (DO) framework (Kornblum et al.,1990),stimulus response compatibility (SRC) effects (Proctor and Reeve,1990) can becategorized and attributed to DO (i.e., similarity of properties) betweenstimulus-stimulus (S-S) sets or between stimulus-response (S-R) sets in experimentalcontext. Based on this account, we can examine the modular organization of thecognitive control network and test whether there exist a common conflict monitoring(CM) module and executive control (EC) module responsible for both S-S and S-Rconflicts (1CM1EC model). Alternatively, we hypothesized that CM modules may bedistinct for S-S and S-R conflicts, but both conflicts may be modulated by a commonEC module (2CM1EC model). Our previous behavioral and brain imaging studies haveprovided evidences for the2CM1EC model (Liu et al.,2004, Liu et al.,2010).In this study, we developed and evaluated two biologically realistic neural networkmodels (1CM1EC and2CM1EC), by simulating behavioral performances of humansubjects in the Simon-color-Stroop task.