Why it is hard to name the ink of the word RED printed in blue, what John Ridley Stroop found in 1935, and how you can feel the effect yourself in a minute.
Blog
Articles about the Tyamka games, how to play them and what the results mean.
- The Stroop effect explained in plain words
- Stroop test examples you can try with a pen or in a browser
Stroop effect examples you can say out loud, from color words to numbers, pictures and direction words, and what changes when you read in a second language.
- Sum puzzle strategy, where to start and how to solve it without guessing
A step by step way to solve a number grid where you remove numbers until every row and column hits its target, with a worked 4×4 example.
- A Ukrainian word game, and how we built its dictionary
How the Ukrainian word list for Word Grid was put together, where the words come from and under which license, and why only nominative singular nouns count.

- Visual working memory, and what an average score on a visual memory test means
Visual memory versus visual working memory, what Luck and Vogel measured in 1997, and why their four items are a research result, not a target for you.

- What is a Schulte table? How it works and how to do your first one
A Schulte table is a square grid of shuffled numbers that you find in order, as fast as you can. Where it comes from, how to do one and how to practice.
- What is working memory? Everyday examples and the model behind the term
Working memory explained with everyday examples, the Baddeley and Hitch model, how small its limits are, and which three games on this site rely on it.

- What does the Stroop test measure, and what can an online score tell you
The Stroop test measures how much a conflicting word slows you down. How researchers score it, why one result says little, and what our points mean.
- Word grid game tips, where to look for words and when to go long
Practical tips for word grid games where you join touching letters, from word endings and diagonals to when a long word beats a quick short one.