Скачать или смотреть Psychophysics: The Hidden Math of Your Senses

Psychophysics is how experimental psychology turns sensations into numbers. In this video, we break down absolute thresholds, JNDs (just noticeable differences), Weber–Fechner laws, Signal Detection Theory (d′, criterion, ROC), psychometric functions, and modern task designs (2AFC, staircases) — with simple experiments you can actually run.

What you’ll learn:

Absolute vs. difference thresholds (JND)

When Weber–Fechner laws hold — and when they don’t

Signal Detection Theory: sensitivity (d′) vs. decision bias

Psychometric functions: threshold, slope, lapses

Practical methods: method of limits, constant stimuli, adjustment, staircases

Two plug-and-play paradigms: visual contrast 2AFC and auditory tone detection with SDT

Quick experiment checklist:

Randomize trials; collect dense data near threshold

Use forced-choice to reduce bias, or collect ratings for ROC

Calibrate stimuli (luminance/SPL) and control the environment

Predefine threshold (e.g., 50% detection or 75% correct) and report CIs


Comment the experiment you want to try first — vision or audio — and I’ll share a one-page protocol and reporting template.

Hashtags
#psychology #psychophysics #perception #experiment #neuroscience #research #cognition #attention #sensation #humanfactors