Interactive Demo
Signal Detection Lab
Signal Detection Lab is a free, interactive learning demo from the AP Psychology course on Lykke. It helps you build intuition for Memory Encoding and Retrieval, Cognitive Biases, Intelligence Theory, Language Acquisition. Play with it directly in your browser — it features 2 sliders, direct drag interaction and a live visual canvas. This demo lives in the “Unit 2: Cognition” section of the course.

How to use this demo
- Drag the “Sensitivity (d'): 1.50”, “Criterion (c): 0.75” sliders to change the inputs and watch the result update live.
- Click and drag directly on the canvas to manipulate the scene.
- Experiment freely — there's nothing to break, and every change is reversible.
What you'll explore
- Memory Encoding and Retrieval
- Cognitive Biases
- Intelligence Theory
- Language Acquisition
- Sensation vs. Perception
- Thresholds and Signal Detection
Frequently asked questions
What does the Signal Detection Lab demo do?
0% Psychophysics Insight: When signals are weak (low d'), increasing your threshold reduces False Alarms but causes more Misses. This trade-off is the core of Signal Detection Theory. Signal Detection Lab lets you explore this hands-on instead of only reading about it.
What AP Psychology concept does Signal Detection Lab teach?
Unit 2 focuses on the complex mental processes involved in memory, thinking, intelligence, and language. It also covers the mechanics of sensation and perception, explaining how we process and interpret environmental st… It focuses on Memory Encoding and Retrieval, Cognitive Biases, Intelligence Theory, Language Acquisition, Sensation vs. Perception, Thresholds and Signal Detection from the “Unit 2: Cognition” section.
What can I control in Signal Detection Lab?
The “Sensitivity (d'): 1.50”, “Criterion (c): 0.75” sliders change the key inputs; you can drag elements directly on the canvas. Every change updates the visualization in real time, so you can see exactly how each variable affects the outcome.
How does Signal Detection Lab fit into the AP Psychology course?
AP Psychology introduces students to the systematic and scientific study of human behavior and mental processes. Throughout the course, students explore the biological, cognitive, and social factors that shape human exp… This demo is the interactive piece for the “Unit 2: Cognition” section. Open the full AP Psychology course wiki at https://www.getlykke.com/explore/public/ap-psychology-f9878919-5ba6-4fd6-a22e-d172f3b06f84 for notes, flashcards, quizzes and the other demos.
What will I understand better after using Signal Detection Lab?
You'll build intuition for Memory Encoding and Retrieval, Cognitive Biases, Intelligence Theory, Language Acquisition, Sensation vs. Perception, Thresholds and Signal Detection — and, crucially, see how they behave when you change the inputs, which is hard to get from a textbook or lecture on AP Psychology alone.
From the AP Psychology course
This interactive demo is part of the Unit 2: Cognition section. Explore the full AP Psychology course wiki on Lykke — with notes, flashcards, quizzes and more interactive demos.
Open the AP Psychology course →