vigilance decrement

https://doi.org/10.1351/goldbook.12172
Decreased vigilance measured as a decline in the ability to maintain an accurate voluntary response to signals with time.
Source:
PAC, 2015, 87, 841. (IUPAC Glossary of terms used in neurotoxicology (IUPAC Recommendations 2015)) on page 916 [Terms] [Paper]