Learn the rule
Select Respond or press Space for GO. For WAIT, let the response window finish without responding.
Go/No-Go Test
Respond to GO cues and withhold your response to WAIT cues. Review missed targets and false alarms separately.
Why practise go/no-go?
Practise following a simple response rule without treating speed as the only goal. Separate missed GO cues from responses made to WAIT cues.
This is practice with one task rule. It does not diagnose attention difficulties, measure self-control in daily life or establish broader cognitive improvement.
Choose this task for a clear practice goal
Use one short task to explore its specific rule, then compare matching sessions.
Repeat a stable setup
Keep the same settings, input and device. Check mistakes and misses before interpreting a faster response.
Review a small summary
Keep local numeric history or save an accepted session to your optional account. You do not need to upload private practice material.
How Go/No-Go works
Select a response window and 10, 20 or 30 rounds. Press Space or use Respond for GO. Keep the same setup and device for comparisons.
About three quarters of the shuffled cues are GO: 8 GO and 2 WAIT in the default 10-round session (15/5 for 20 rounds; 23/7 for 30). Respond once to GO; withhold your response for the entire WAIT window.
A response to WAIT is a false alarm. A missed GO is a miss. Correct rejections and GO response speed are shown separately.
Understand your result
False alarms are responses to WAIT. Misses are GO cues that received no response. The median uses correct GO responses only.
| Metric | Meaning |
|---|---|
| Correct decisions | Correct answers plus correctly withheld WAIT responses for Go/No-Go. Missed responses remain separate from answered errors. |
| Median correct response | Middle response time among correct selections or correct GO responses. Incorrect and missed responses do not lower the median. |
| Missed responses | Presentations that reached the deadline without the required decision. Withholding a WAIT response is correct, not a miss. |
| Interruptions | A count of pauses or hidden-tab interruptions. Keep interrupted sessions separate from clean timing comparisons. |
Repeat the same window and input. Reduce false alarms and misses before choosing a shorter window.
Frequently asked questions
Short answers that clarify the main value of this article.
Do I need an account to practise?
No. You can complete the task and keep a bounded local history in this browser without signing in. An optional account lets you save accepted session summaries and review them on another device.
What does this result measure?
This is practice with one task rule. It does not diagnose attention difficulties, measure self-control in daily life or establish broader cognitive improvement.
Are my words, cues or answers uploaded?
The task keeps stimuli and answer order in memory for the current session. Saved history and completion reporting use allowlisted settings and numeric summaries, without the words, cue sequence or individual answers.
Try another short task
Choose a different task and compare results only within the same settings.
Choice Reaction Time
Select the matching direction
Short sessions · Clear feedback · Local history
Choice Reaction Time Test
Browser toolGoal: Practise choosing an accurate response
Match each arrow to its response. Compare correct selection speed and accuracy with two or four choices.
Start practiceStroop-style Color Challenge
Match color words to their ink color.
Stroop-style Color Challenge
Free browser trainerGoal: Stroop-style Color Challenge
Decide whether a color word matches its ink color. Choose 10, 20 or 30 rounds, or practise for 30, 60 or 90 seconds, and review accuracy and response time.
Start: Stroop-style Color ChallengeReaction Time Test
Respond to one visual signal
Median • Fastest • Spread
Reaction Time Test
Browser toolGoal: Response-speed measurement for one visual signal
Wait for an unpredictable visual signal, then respond as quickly as you can. Choose 1 to 10 trials and review your median, average, fastest time, and false starts.
Test Reaction TimeUnderstand your practice
Read practical guidance about interpreting and repeating browser tasks.
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Choose a Reaction Task
Compare simple reaction time, choice reaction and Go/No-Go with one worked example. Understand the rules and errors, then choose a reaction practice task.