simple reaction time test

https://doi.org/10.1351/goldbook.12076
Procedure to assess psychomotor speed in which a test subject is presented at irregular intervals with a visual stimulus, such as a coloured dot on a screen, and is asked to press a button immediately after noticing the stimulus.
Notes:
  1. Premature or untimely late reactions should be minimized during an initial practise phase.
  2. Many variations of the test exist.
Source:
PAC, 2015, 87, 841. (IUPAC Glossary of terms used in neurotoxicology (IUPAC Recommendations 2015)) on page 905 [Terms] [Paper]