Effect of alcohol on the speed of shifting endogenous and exogenous attention.

Abstract

The study aimed to investigate to what extent acute moderate doses of alcohol affect the speed of endogenous versus exogenous attentional shift times. Subjects viewed an array of 10 moving clocks and reported the time a clock indicated when cued. Target clocks were indicated by cues, presented peripherally at the target clock or centrally pointing toward a target clock, including conditions of where the target location was cued in advance, that is, precueing. This allowed assessing shift times when attention was preallocated, when peripheral cues triggered exogenous attention shifts, and when central cues triggered endogenous attention shifts. Each subject participated in two sessions (alcohol/placebo), whereby the order of alcohol/placebo intake was counterbalanced across subjects, and subjects were blinded to conditions. Confirming previous results, we show that precuing resulted in the fastest shift times, followed by exogenous cuing, with endogenous attentional shifts being slowest. Alcohol increased attentional shift times across all three conditions compared to placebo. Thus, the detrimental effects of alcohol on attentional shift times did not depend on the type of attention probed. (PsycInfo Database Record (c) 2025 APA, all rights reserved).