# Titchener circles

> English word · Noun

## Definitions
1. Synonym of Ebbinghaus illusion.

## Etymology
The illusion was popularized in the English-speaking world by Edward B. Titchener in a 1901 psychology textbook.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/titchener-circles