Economics task. Pairs of stimuli (four letters from the Latin alphabet) are presented on the screen in white on a black background. To maximize gains, subjects are asked to choose a letter by pressing one of the two keyboard keys, corresponding to the stimulus on the left or right of the screen. Each choice prompts two visual feedbacks, the first displaying the money won or lost and the second indicating the total sum of money the subject was gaining. Each stimulus pair is preceded by a black screen. Six different stimulus pairs (AB, AC, AD, BC, BD, CD) are presented. Stimulus pairs comprised stimuli with the same probability to win (conflictual trials) and different probability to win (non conflictual trials). The letters "A" and "D" led to positive feedback (+60 Euros) 80% of the times and to negative feedback (-30 Euros) 20% of the times (non risky letters). "B" and "C" letters led to high positive feedback (+100 Euros) only 20% of the times and to a high negative feedback (-70 Euros) 80% (risky letters). The task is designed to reward non risky choices, so that the larger the number of non risky choices, the higher is the amount of money earned. The task comprises 102 trials, 68 non conflictual and 34 conflictual (Rosa et al., 2013).