Background: Humans interact with multiple stimuli across several modalities each day. The “redundant signal effect” refers to the observation that individuals respond more quickly to stimuli when information is presented as multisensory, redundant stimuli (e.g., aurally and visually), rather than as a single stimulus presented to either modality alone. Studies of alcohol effects on human performance show that alcohol induced impairment is reduced when subjects respond to redundant multisensory stimuli. However, redundant signals do not need to involve multisensory stimuli to facilitate behavior as studies have shown facilitating effects by redundant unisensory signals that are delivered to the “same sensory” (e.g., two visual or two auditory signals). Methods: The current study examined the degree to which redundant visual signals would reduce alcohol impairment and compared the magnitude of this effect with that produced by redundant multisensory signals. On repeated test sessions, participants (n = 20) received placebo or 0.65 g/kg alcohol and performed a two-choice reaction time task that measured how quickly participants responded to four different signal conditions. The four conditions differed by the modality of the target presentation: visual, auditory, multisensory, and unisensory. Results: Alcohol slowed performance in all conditions and reaction times were generally faster in the redundant signal conditions. Both multisensory and unisensory redundant signals reduced the impairing effects of alcohol compared with single signals. Conclusions: These findings indicate that the ability of redundant signals to counteract alcohol impairment does not require multisensory input. Duplicate signals to the same modality can also reduce alcohol impairment.
|Journal||Drug and Alcohol Dependence|
|State||Published - Apr 1 2020|
Bibliographical noteFunding Information:
This research was funded by the National Institute on Alcohol Abuse and Alcoholism Grant R01 AA021722 and Training Grant T32 AA027488 . The NIAAA had no further role in study design; in the collection, analysis, and interpretation of data; in the writing of the report; or in the decision to submit the paper for publication. The content is solely the responsibility of the authors and does not necessarily represent the official views of the NIAAA.
© 2020 Elsevier B.V.
- Reaction time
- Redundant signal effect
ASJC Scopus subject areas
- Psychiatry and Mental health
- Pharmacology (medical)