Fig. 1

Task layout. The task comprised four runs with two types of blocks: scenic and delay discounting (DD) blocks. During the scenic block, participants performed a time perception (TP) task while passively viewing scenery video clips (40Â s). For the TP task, participants had to indicate when they thought a 30-s time span had elapsed by pressing a button. The scenery moved in two directions: left-to-right or right-to-left. After an inter-stimulus interval, seven DD tasks were sequentially presented for 4Â s each, yielding a total of 28Â s.