## 2 Methods
### Testing Day Measures
If participants chose to use the keyboard, they were asked to press the left arrow for the primary, the right arrow for the secondary, and the up arrow for the tertiary task. Of the 480 stimuli presented, there were 8 primary targets, 8 secondary targets, and 48 tertiary targets over the course of the 8 min protocol. The task was scored for the number of correct detections of each target, average reaction time for correct detection of each target, the number of false alarms for each task, and errors of omission (missed targets) [10; 11; 45; 46]. 4. Concentration Task Grid (CGT)--A 100 square grid was used as a measure of concentration. The grid is arranged in a 10 \(\times\) 10 square with each square containing a two-digit number (from 00 to 99) which is randomly placed in the center of each of the squares. Participants were asked to mark off as many consecutive numbers as possible starting from 00 within a one-minute period, by tapping on the desired square [47]. 5. Distractors--Participants were presented target arrows, in either red or green, every 1000 ms. Prior to the start of each test, participants were informed whether the color of the target for the test was red or green. Participants were asked to press the direction of the arrow presented on the screen only if it was a target. For example, If the target was red and the arrow presented on the screen was red, then participants pressed the arrow on the keyboard that corresponded with the direction of the arrow presented on the screen [48]. A total of 12 distractors were presented during each one-minute test and participants were scored for correct responses, incorrect responses, and average response time for each correct response. 6. Paced Visual Serial Addition Task (PVSAT)--Participants were asked to start at the number 0 and add the digit shown on the screen (0-9). Participants were then asked to remember the previous number and add the next digit presented on the screen and type their responses on the keypad [49]. After each entry, a new digit was presented. Participants were given one minute to add as many digits as possible. In the case of incorrect responses, subsequent responses were scored as correct if they were correct in relation to the new number. Participants were scored for the number of correct responses and the average time it took to complete each correct response. 7. Stroop Task--Participants were presented words (Tahoma font, 20 point), every 1000 ms, on a screen spelling the names of colors (i.e., blue, yellow, red, green), which were either congruent (words presented in the same color as the color they were spelling out, such as the RED presented in red font) or incongruent (words presented in a color different from the color that they spelled out, such as the word RED spelled in green font). Participants were presented with all five options of colors used in this test (red, green, yellow, black, and blue) and asked to press the color of the text (font color) and not the word presented on the screen. There were 30 congruent and 30 incongruent tasks presented in random order and participants were scored on the number of correct responses, number of incorrect responses, and the average reaction time for correct responses. Each test was scored separately for both congruent and incongruent tasks [50; 51]. 8. Eriksen Flanker Task--During this task, participants were first presented with a white fixation cross for 200 ms, followed immediately by five equally sized arrows arranged in a 10.5 cm horizontal array for 800 ms. Participants were instructed to attend to the central arrow and ignore the four flankers. Participants were asked to press the left key if the central arrow was facing left and the right arrow if the central arrow was pointed to the right. If all arrows were pointing the same direction (e.g., \"\(<\) \(<\) \(<\) \(<\) \(<\) \(<\) \"), then the trial was considered congruent. However, if the central arrow was pointing in the opposite direction (e.g., \"\(>\) \(<\) \(>\)\") then the trial was considered incongruent.