July 2016, Vol. 42, No. 2 January 1, 2024 August 13, 2024 Event Rate and Vigilance: A Psychophysiological Investigation of Mental Workload Page No.328-336 Anil Kumar Yadav*, Shalini Dubey** & I.L. Singh** Indira Gandhi National Tribal University, Madhya Pradesh* Banaras Hindu University, Uttar Pradesh**