Participants who have recently consumed alcohol.

Participants who have not recently consumed alcohol.

Participants will enter the MRI scanner and complete a series of computer tasks that include noise blasts while undergoing brain scans that measure the structure and function of the brain

Aggressive behavior (i.e., the average volume of noise blasts selected to be administered to participants' opponents) after recent consumption of an alcoholic beverages (versus without recent consumption of an alcoholic beverages) will be measured using the validated and computerized Taylor Competitive Reaction-Time Task. The Taylor Competitive Reaction-Time Task consists of multiple trials that each assess aggression, via a four-point scale that ranges from 1 (low noise blast volume [low aggression]) to 4 (high noise blast volume [high aggression]). Noise blast settings are averaged to provide a total score ranging from 1 to 4, with higher scores indicating greater aggression.

Participants who have recently consumed alcohol.

MRI Scanner: Participants will enter the MRI scanner and complete a series of computer tasks that include noise blasts while undergoing brain scans that measure the structure and function of the brain. We are reporting the data per sequence. The results being reported apply only to Aim 4 of the grant.

The results being reported apply only to Aim 4 of the grant. Aims 1-3 focused on analyzing existing archival genomic data and were covered by another protocol, which was not entered into CT.gov, as those aims did not meet the definition of a clinical trial and were approved under a different IRB protocol number and approval process than Aim 4. All participants only completed one session, but within that one session, they completed the loud noises task two times in a row on the same MRI scan, it was done twice to get a more reliable answer when the two measures were combined.

Aggressive behavior (i.e., the average volume of noise blasts selected to be administered to participants' opponents) after recent consumption of an alcoholic beverages (versus without recent consumption of an alcoholic beverages) will be measured using the validated and computerized Taylor Competitive Reaction-Time Task. The Taylor Competitive Reaction-Time Task consists of multiple trials that each assess aggression, via a four-point scale that ranges from 1 (low noise blast volume [low aggression]) to 4 (high noise blast volume [high aggression]). Noise blast settings are averaged to provide a total score ranging from 1 to 4, with higher scores indicating greater aggression.

The results apply only to Aim 4. Aims 1-3 were covered by another protocol that did not meet the definition of a ct and were approved under a different IRB protocol #. All participants completed only one session, but within that session, they performed the loud noises task twice consecutively on the same MRI scan.It was done twice to get a more reliable answer when the two measures were combined.

Participants who have recently consumed alcohol.

MRI Scanner: Participants will enter the MRI scanner and complete a series of computer tasks that include noise blasts while undergoing brain scans that measure the structure and function of the brain

The results being reported apply only to Aim 4 of the grant. Aims 1-3 focused on analyzing existing archival genomic data and were covered by another protocol, which was not entered into CT.gov, as those aims did not meet the definition of a clinical trial and were approved under a different IRB protocol number and approval process than Aim 4. All participants only completed one session, but within that one session, they completed the loud noises task two times in a row on the same MRI scan, it was done twice to get a more reliable answer when the two measures were combined.