The MindLogger flanker task implementation is an alternate version of the classic Ericksen flanker task, which is considered a classic test of executive function. Similar to other modern flanker implementations (Fan, et al., Meyer, et al.), the MindLogger flanker task version uses directional markers rather than letters as stimuli. On each trial, the participant is presented with an array of five stimuli arranged in a horizontal line central to the screen. The participant’s task is to identify the orientation of the central stimulus (left vs. right), while ignoring the stimuli flanking it on either side. The flanking stimuli will be presented in the same orientation as the central stimulus (congruent), the opposite orientation to the central stimulus (incongruent), or with no directional orientation (neutral).

Trials are semi-self-paced with a maximum three-second response window, and a 500-millisecond fixation between trials. Once the user responds, the flanker stimuli are removed and a fixation image is presented. The trials include an equal number of left and right responses, equally distributed between congruent, incongruent, and neutral trial types. Users complete a brief practice session of 30 trials, with feedback following every trial, before moving on to the test phase which will not present any feedback.

The relative cost in terms of reaction time and accuracy associated with overcoming the conflicting information presented in an incongruent trial vs. a congruent or neutral trial is thought to reflect the functioning of higher-order executive cognitive processes.

References

• Fan, J., et al., Testing the efficiency and independence of attentional networks. Journal of Cognitive Neuroscience,
  1. 14(3): p. 340-347.
• Mayr, U., Awh, E., & Laurey, P. (2003). Conflict adaptation effects in the absence of executive control. Nature Neuroscience, 6, 450-452.

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