Processing Speed · Analogue 03

Field Marks

A cancellation task: sweep the field and mark every target you can find before time runs out.

How it works

You will see a field full of colored shapes. Two of the shape–color combinations are targets. Tap every target you find. Tapping a shape marks it; tapping again unmarks it.

There are two timed sweeps of 45 seconds each. The first field is scattered; the second is arranged in neat rows and uses a different pair of targets. The target key stays pinned to the top of the screen while you work.

Scoring: each correct mark earns a point, and each incorrect mark takes one away — so accuracy matters as much as speed. Work quickly, but only mark shapes you are sure about.

You'll do a short untimed practice first, with feedback.

Start practice

This is an informal instructional analogue inspired by the cancellation task paradigm. It uses original stimuli, is not a normed or diagnostic instrument, and produces no clinical scores. Note: because targets are defined partly by color, results are not interpretable for respondents with color-vision differences.

Practice

Your targets for this practice round:

Targets

Mark every target below, and nothing else. Then press Check.

Check my marks Begin Sweep 1

Targets

45

I've marked them all

Results

By sweep

Sweep	Targets	Hits	False alarms	Missed	Score

Pacing

Correct marks made in each 9-second slice of the two sweeps.

Sweep 1 (scattered) Sweep 2 (rows)

Copy summary Download CSV Run again

Informal analogue — scores are for instruction and self-observation only.