Cognitive training

A Go/No-Go exercise: react as fast as possible to a "go" visual stimulus, without reacting to a "no-go" one. Difficulty grows with the number of stimuli (8 to 30) and shrinking delay windows.

A classic simple reaction time paradigm, studied since Donders' work (1868) on mental chronometry; the Go/No-Go variant, formalized in the 1960s, is now a standard response-inhibition test used in attention assessment.

Same principle as the visual exercise, applied to sound: react as soon as the audio signal sounds.

Auditory reaction time is on average 30 to 50 milliseconds faster than visual reaction time, since the auditory pathway requires shorter neural processing — a gap documented since Donders' foundational work (1868).

Solve as many operations as possible in a limited time (45 to 120 seconds depending on level); operators progressively grow more complex, from addition/subtraction up to division.

Exercise inspired by the fast mental arithmetic protocol popularized by Japanese neuroscientist Ryuta Kawashima (Tohoku University), whose prefrontal cortex activation has been studied in several cognitive stimulation papers.

Memorize a briefly displayed sequence of digits, then reproduce it in order. Sequence length (3 to 12 items) grows with level, while display time shrinks.

Inspired by Wechsler's Digit Span test (1939), a historical component of the WAIS and WISC intelligence scales, and by the Corsi Block-Tapping Test (1972) for the visuospatial dimension — a reference measure of short-term working memory.

Identify the ink color of a word, without being distracted by the word itself, which often names a different color. Three difficulty tiers.

Developed by John Ridley Stroop in 1935, this test is today one of the reference tools of clinical neuropsychology (D-KEFS, Golden Stroop batteries) for measuring inhibition and selective attention.

Spot several targets among a set of identical shapes, then track them by eye as they move and intermingle, before identifying them once stopped. Target count (1 to 6), movement speed and tracking duration grow with level.

Based on the Multiple Object Tracking paradigm, introduced by Pylyshyn and Storm in 1988 and since studied in contexts of very high performance, notably sport and military (Vartanian et al., Military Psychology, 2016).

Keep a steady tapping rhythm while reacting to Go/No-Go stimuli appearing in parallel — a dual task that engages divided attention. From level 21 onward, the rule can flip mid-exercise, to train fast adaptation.

Inspired by dual-task and task-switching paradigms used in cognitive psychology, aviation, and attention-load training for elite athletes.