Holmgren test

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One of the first scientific tests of colour vision, still in use, involving the selection of coloured woollen skeins to match three standard skeins. Compare Ishihara test, Stilling test. [Named after the Swedish physiologist Alarik Frithiof Holmgren (1831–97) who introduced it in 1879 following a railway disaster at Lagerlunda, Sweden, that was believed to have resulted from the driver's colour-blindness]

Subjects: Psychology.

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