## Variables and levels ## For the sake of clarity, variables are described in separated groups. **General procedure** - Experiment: we present here data from five different experiments, i.e., Experiments 1 and 2 of Luna et al. (2018) and Experiments 1, 2, and 3 of Luna et al. (2020). - Attentional_Set: - Flankers: single task condition, i.e., to perform the flanker task. - Flankers and Horizontal detection: dual task condition, i.e., to perform the flanker task while attempting to detect an infrequent horizontal displacement of the target. - Flankers and Vertical detection: dual task condition, i.e., to perform the flanker task while attempting to detect an infrequent vertical displacement of the target. - Flankers and Horizontal and Vertical detection: dual task condition only in Experiment 3 of Luna et al. (2020), i.e., to perform the flanker task while attempting to detect an infrequent horizontal or vertical displacement of the target. - Participant_Code: codes were assigned within each experiment. - Participant_Outlier: 1=included in data analyses; 0=excluded from data analyses (see Luna et al. 2018 and Luna et al. 2020 for more details) - Trial_Session: trial order within the experimental session. - Trial_Block: trial order within each experimental block. **Stimuli features and position** - Displacement_of_Target: target position regarding its central position (center: non-displaced target/horizontal: horizontal displacement/vertical: vertical displacement). Interference effect was analyzed only in 'center' trials. The 'down_counter' level refers to trials in which an arousal component of vigilance was measured (see Experiment 2 of Luna et al., 2018, for further details). Note that in these trials, there are no data (NA) for arrows' features, accuracy and reaction time. - Congruency: conditions of interference between target and distractors (congruent/incongruent) - Target_direction: direction pointed by the target arrow (left/right). - X_T, X_L1, X_R1, X_L2, X_R2, Y_T, Y_L1, Y_R1, Y_L2, Y_R2: variables regarding the position of the target ('T') and the flankers (left: 'L1', 'L2'; right: 'R1', 'R2') in the horizontal (X) and vertical (Y) axis. The position is reported in pixels, considering a screen resolution of 1024 (wide) and 768 (height). **Performance** - Accuracy: 1=correct response, 0=incorrect response. - Reaction_Time: in milliseconds