Signal Detection Test
Neuro-SensomotoricWatch a dark field of about 25 small white dots that appear and disappear at random, and press the moment four of them form a square. A practice version of SIGNAL, Schuhfried's signal-detection vigilance test in the Vienna Test System, with the S1 white-on-black and S2 black-on-white forms and a sudden-death Challenge mode.
Overview
The Signal Detection Test mirrors the publicly documented format of SIGNAL, Schuhfried's long-duration vigilance test in the Vienna Test System: a dark screen scattered with about 25 small white dots that appear and disappear at random positions, and a single response — press the button as fast as possible whenever four dots form a square. The dot field, the four-dots-form-a-square signal, the one-response design, the roughly 20-minute full-length watch phase and the two presentation forms, S1 white on black and S2 black on white, follow the published test description, and the results follow the catalog's scoring model: correct, delayed and incorrect reactions plus the median detection time. Here Space or a click on the field is the response button, a square arrives roughly every 12 to 20 seconds, and the noise never forms a square by accident, so every square you see is real. Every run is recorded, and the results screen can replay it: scrub anywhere on the timeline and watch where each square appeared, green for the ones you caught and red for the ones that got away. Beyond the timed runs there is a sudden-death Challenge: no clock, squares arriving faster and faster, and the run ends at your first missed square or false alarm — only Challenge runs enter the Top Scores leaderboard. Scores are descriptive practice numbers, not percentiles: the test reports your detection rate, reaction breakdown and median detection time.
Assessments
Could show up in Schuhfried-based selections.
Airline mappings are based on public information and may change.
Example: one signal in the dot field
Dots appear and disappear at random positions the whole run. The one thing you are watching for is four dots forming an upright square — and the one thing you ever do is press Space (or click the field) the moment they do.
The field: small dots scattered on the dark screen. Dots keep vanishing and appearing elsewhere — all of it is noise, and none of it ever forms a square by accident.
Game Phases
Watch the field
About 25 small dots sit scattered on the dark screen. Individual dots keep vanishing and new ones keep appearing elsewhere, so the pattern churns continuously — most of it is noise.
Spot the square
At irregular intervals, four dots appear standing exactly on the corners of an upright square. Size and position vary; there is never more than one square at a time, and the noise never forms one by accident.
Press fast
Press Space or click anywhere in the field the moment you see the square. It only stays for about three seconds — press while it shows for a correct reaction, or in the short grace right after it dissolves for a delayed one.
Never guess
Pressing when no square has appeared is an incorrect reaction and costs a point — and in Challenge mode it ends the run on the spot, as does a square dissolving unanswered. Respond to every real square, and to nothing else.
More Practice
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