Several studies had consistently lighted mechanisms about the relation between spatial and numerical cognition; parallel to this, a separate research line begin to document similar relationships for the representation of time and quantity as well. However there are still few studies that explore cognitive mechanisms subserving this relation. Starting from the evidence of the SNARC effect (Dehaene et al., 1993), here we investigate about the presence of similar effect in the processing of temporal and numerical information. We studied the effects of numerical exposure when participants are asked to perform a visual detection task in which temporal information is explicitly or implicitly conveyed. The main result shows that, during explicit timing, low digits exposure improve reaction time in the judgment of shorter duration whereas big digits exposure improve reaction time in judgment of longer duration. No interaction between temporal and numerical information is documented when participants perform implicit timing task. Results suggest a role quantity exposure for timing task-dependent attentional orientation. 


