Go / No-Go

A shape flashes on screen. Click for green circles, resist clicking for red squares. Tests impulse control.

1Green circle = Click as fast as you can

2Red square = Don't click! Hold back

320 trials — be fast but controlled

~1 minute · No sign-in required

Trial 1 / 20

Get ready…

Click

Don't click

— d'

Sensitivity (d-prime)

LowerAverageHigher

—

Hits

—

False Alarms

—

Go RT

📏 Score Ranges

Excellent

> 3.5 d'

Top 10%

Good

2.5–3.5

Above avg

Average

1.5–2.5

Most adults

Below Avg

< 1.5

Bottom 25%

🚦 About Go/No-Go

This task measures response inhibition — the ability to suppress a prepotent response. It's a core measure of executive function used in ADHD research.

d-prime combines your hit rate and false alarm rate into a single sensitivity score, separating true ability from response bias.

⚙️ What Affects It?

😴	Sleep	Sleep deprivation increases false alarms dramatically.
🍷	Alcohol	Even small amounts impair inhibition control.
🏃	Exercise	Acute exercise improves inhibitory control.
⏰	Time of Day	Inhibition is strongest in the morning hours.