Figure 2. Clock-check responses across time.

. The mean number of clock-checks in each minute during TBPM condition is displayed (referenced to the target time; e.g., Target-1 refers to last minute prior to target time). Clock-checks reliably increased in frequency with increasing proximity to the PM target time. Clock-checks in the final minute (Target-1) were significantly greater than all preceding minutes combined, consistent with prior findings, indicated by a * over the T-1 period (p<.05). ⁺ Target-4 only contains data from 4-minute trials. 3-minute trials were shifted accordingly to align the last minutes.