Fig. 1.

Relational Reasoning Task. a) Example of a low-relational problem: 1-relational reasoning matrix, with a vertical increase in the number of items (the correct response is the first from the right). b) Example of a high-relational problem: 3-relational reasoning matrix, with a horizontal change in colour, a horizontal change in the length of the bar and a change in rotation of the bar (the correct response is the second from the left). c) The stimuli were presented until the participant responded (within a maximum of 40 s). Next, participants' responses were highlighted in blue for 0.8 s. Finally, participants received feedback about their performance.