Fig. 2. Experimental design.

a Experiment trial structure and response mappings. Left: structure of an exemplar block. Participants were first cued to navigate to a target building and then entered a room in the building (top row). They then performed eight perceptual decision-making trials within the room (bottom row). Right: response mapping. Blue, yellow, green and red buttons correspond to index, middle, ring and pinky fingers, respectively. Participants were randomly assigned to use one hand to respond to faces and to use the other hand to respond to objects. b Task cues and an example stimulus pair. Depending on the letter/task cue (left), participants were to identify the gender of the face or the type of object in the compound stimulus (right). c Building exteriors and room interiors for the four contexts. For each participant, the mapping of the four contexts to the two CTDs was randomly assigned.