PrefrontThe Prefront blog
Short reads on attention, focus habits, and the classic cognitive tasks behind our training games.
What Is the Stroop Effect? Definition, Meaning, and Examples
The Stroop effect, explained simply: the definition and meaning of the phenomenon, why it happens, the 1935 experiment, and how psychologists use it — plus a free online test.
Read articleThe Stroop Task: How the Classic 1935 Experiment Works
A walkthrough of the Stroop task: the original 1935 experiment, congruent vs incongruent trials, how interference is measured, and a free browser version to test yourself.
Read articleWhat Is the N-Back Task? How It Works and What It Trains
The n-back task, explained simply: what n means, how a trial runs, where the task came from, and what the brain-training debate actually found — plus a free browser test.
Read articleWhat Is a Schulte Table? The Attention Grid Behind Speed Reading
The Schulte table, explained simply: the 5×5 number grid, its clinical origin, what it measures, and why speed-reading apps love it — plus a free browser version.
Read articleWhat Is Memory Span? How Much Your Brain Can Hold at Once
Memory span, explained simply: digit span since 1887, Miller's famous 7±2, the Corsi block test, and the Simon game — plus a free browser test of your own span.
Read articleWhy Five Minutes a Day Beats an Hour Once a Week
Short, frequent sessions are easier to start, easier to repeat, and easier to measure. The design logic behind the 5-minute attention gym.
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