A response inhibition task where participants respond to frequent targets and withhold responses to non-targets.
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Include practice trials
Shown with feedback before the main task
Task parameters
Sebastian et al. (2013): “Subjects were instructed to make a right indexfinger button press for every letter (go stimulus) except for the letter “X” (no-go stimulus). For the go stimuli, a letter was randomly chosen from all consonants of the alphabet except the “X”.” Letters appear large and centred, in one colour, on a blank screen. Custom participant instructions, if set, must describe the same stimulus.
Sebastian et al. (2013): “Every stimulus was displayed for 500 ms immediately followed by a blank screen for 500 ms.” Here one stimulus appears every 1000 ms, whatever the response. A tap counts for the stimulus from its onset until the next stimulus, including the blank; Sebastian et al. do not say whether taps during the blank counted, so trials store duringBlank for each tap. Only the first tap per stimulus counts. Practice shows feedback after each stimulus, so it runs slower.
300 trials with 87 no-go (29%), about 5 min. Sebastian et al. (2013): 300 stimuli per run (“Per run, 300 stimuli were presented”) and 29% no-go (“Mean probability for no-go stimuli was 29%”), a go ratio of 0.71. Every no-go trial is followed by a go trial (“a no-go stimulus was always followed by a go stimulus”), so there are never two in a row and the last trial is a go trial; the first trial is a go trial too (no published source). This holds while no-go trials are fewer than half. The practice length has no published value (8 is kept from earlier versions).
Needs the app version released with these options; older app versions ignore them and show green and red circles (colour only) instead of letters, and end a trial at the tap.
This is a researcher preview. No participant data is recorded.
Simulated participant view
A response inhibition task where participants respond to frequent targets and withhold responses to non-targets.
No data is recorded
A stream of letters in the centre of the screen: tap for every consonant (go) and not for the letter X (no-go), as in Sebastian et al. (2013). Each letter is shown for 500 ms, followed by a 500 ms blank, at a fixed pace. A shape display (circle vs. square) and a colour display (green vs. red circle) are also available.
Useful when studies need motor inhibition and response-control measurement with very low interaction complexity.
Not ideal if the researcher wants richer rule complexity or broader executive sampling from one task.
Keep the published defaults (Sebastian et al., 2013): letters with X as the no-go letter, 500 ms per letter plus a 500 ms blank, 29% no-go trials and 300 trials (about 5 minutes). No shorter published version of this task was found; for frequent repeated sessions, fewer trials are a deviation from the published procedure.
Good for repeated use but still sensitive to boredom and random responding if task runs too long. Every session has exactly round(trials × (1 − go ratio)) no-go trials in shuffled order; every no-go trial is followed by a go trial (Sebastian et al., 2013), so there are never two in a row and the session ends on a go trial, and the first trial is a go trial (while no-go trials are fewer than half). With the fixed pace, a tap counts for the stimulus from its onset until the next stimulus, including the blank; Sebastian et al. (2013) do not say whether taps during the blank counted, so each tap stores whether it came during the blank. In the Cued CPT the X is the target, so if both tasks run in one study, the letter X means opposite things. In colour-only mode, participants with red–green colour-vision deficiency may not tell go from no-go, which inflates their errors.
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