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Go/No-Go Color Test

Benchmark your cognitive inhibition and motor control. The screen will flash random colors. Click or tap **ONLY when the color is GREEN**. If any other color flashes, suppress your click.

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Go/No-Go Color Test

Click ONLY when GREEN appears. Suppress clicks for other colors. False clicks carry a +250ms penalty.

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Self-Tracking Notice: This assessment is for self-tracking, educational, and cognitive training purposes only. It is not a clinical, medical, diagnostic, or neuropsychological evaluation, and may be affected by display latency, input delays, or device configuration.

How This Test Works

1

What It Measures

Measures inhibitory motor control by presenting colored flashes. Click only when green (Go signal) and suppress responses to red, blue, or purple (No-Go signals). This directly tests your prefrontal cortex response inhibition circuit.

2

How Scoring Works

Score combines correct Go responses (hits) with incorrectly acted No-Go responses (false alarms). Higher scores indicate stronger impulse control and selective attention.

What Affects Your Results

Your ability to suppress automatic motor responses, current fatigue level, and practice with inhibition tasks all affect performance. Sleep deprivation increases false alarm rates by 30-50%.

Want to understand the science? Read our full guide on Cognitive Training & Focus Science .
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Learn about calibration protocols and scientific formulas on our Methodology Page.

What is a Go/No-Go Test?

The Go/No-Go test is a classic psychological paradigm used to measure **inhibitory control**—the cognitive ability to suppress prepotent motor impulses and inappropriate actions.

In this color variant, the "Go" signal is the color **Green**, while all other colors (Red, Blue, Purple, Yellow) act as "No-Go" distractors. Your prefrontal cortex must rapidly classify the flashing stimulus and make a binary split-second decision: release a motor action (click) or actively suppress it.

Commission Errors vs. Omission Errors

This test measures two types of errors:

  • False Alarms (Commission Errors): Clicking when a No-Go distractor (e.g. Red) appears. This indicates a failure of executive motor inhibition and carries a **+250ms penalty** per occurrence.
  • Missed Targets (Omission Errors): Failing to click when the Go target (Green) appears. This indicates lapses in sustained attention or focus.

Explore All Assessments

Explore all 31 cognitive assessments across six domains. Each test runs locally in your browser with sub-millisecond precision.

Reaction & Reflexes

Raw speed & sensory pathways

Memory

Active working capacity & retention

Reasoning

Fluid logic & non-verbal matrices

Focus & Attention

Selective attention & executive suppression

Motor Performance

Spatial mouse control & clicking stamina

Frequently Asked Questions

What is the Go/No-Go cognitive test?

The Go/No-Go test measures response inhibition and motor suppression, assessing the brain's ability to withhold automatic reactions.

What is a commission error (false alarm)?

A commission error occurs when a user clicks on a distractor target (No-Go), indicating a failure of executive impulse control.

What is the average reaction speed on a Go/No-Go test?

The average response speed on correct Go trials is 300ms to 400ms, which is slower than simple reaction tests due to stimulus evaluation.

Is the Go/No-Go test used to diagnose ADHD?

No. While clinical settings use Go/No-Go tests to evaluate attention control, this version is strictly a self-tracking cognitive drill.

How can I reduce false alarms in a Go/No-Go test?

Slow down your response pace slightly to give your visual cortex enough time to confirm the target color before clicking.

Does age affect Go/No-Go performance?

Yes. Executive suppression capabilities peak in early adulthood and slowly decline, though training helps retain inhibition control.

What is the omission error rate?

An omission error is failing to click on a correct Go target. It indicates a lapse in sustained attention or vigilance.

Does sleep deprivation impact Go/No-Go scores?

Yes, sleep deprivation causes a spike in both false alarms (impulsivity) and missed targets (inattention).