“…At short lead intervals, PPI after a lead stimulus that is attended is typically greater than PPI after a lead stimulus that is not attended Filion et al, 1993Filion et al, , 1994Hawk et al, 2002;Hazlett et al, 1998;Jennings et al, 1996;Schell et al, 2000). This increase in PPI is called attentional modulation.…”