Psychometric function

A psychometric function describes how a person's ability to detect or recognize a stimulus (like a sound, light, or touch) changes with its intensity or clarity. It shows the probability that the person will perceive the stimulus correctly at different levels. For example, as a sound gets louder, it's easier to hear, and the function shows this increasing likelihood. Psychometric functions help researchers understand sensory perception thresholds and how performance improves with stimulus strength, providing a mathematical way to model human detection or discrimination abilities across various conditions.