Final answer:
Alcohol consumption can increase aggressive behavior, while the relationship between testosterone and aggression is complex and not fully understood.
Step-by-step explanation:
The influence of alcohol and testosterone on aggressive behavior is complex.
Regarding alcohol, research has shown that consumption of alcohol can increase aggressive behavior. When under the influence of alcohol, a person may experience a reduced level of behavioral control, lowered alertness, and even complete loss of consciousness. Excessive alcohol consumption during pregnancy can also lead to fetal alcohol spectrum disorder (FASD) or fetal alcohol syndrome (FAS) in infants.
In terms of testosterone, studies have not consistently shown a clear relationship between testosterone levels and aggression in males. Factors such as poor methodology and questionable definitions of aggression have made it challenging to determine whether testosterone provokes aggression or the other way around. However, steroid use, which increases testosterone levels, has been associated with increased aggressiveness in some individuals.