What is a common effect of drinking alcohol on reaction times?

Drinking alcohol commonly results in slowed reaction times, which can significantly impair a person's ability to respond quickly to situations. This effect occurs due to alcohol's impact on the central nervous system. The brain becomes less efficient at processing information, which affects coordination and the ability to make quick judgments. As a result, individuals under the influence may struggle with tasks that require rapid reflexes, such as driving, responding to signals, or engaging in any activity that demands immediate attention.

The other options refer to scenarios that are not typical outcomes of alcohol consumption. Increased speed or faster decision-making while under the influence misrepresents how alcohol affects cognitive functions. Rather than enhancing these abilities, alcohol generally reduces mental clarity and slows down the body’s response mechanisms. Similarly, stating that there is no effect on reaction time ignores substantial research that highlights the risks and impairments caused by alcohol consumption.