Which of the following is NOT a common sign of alcohol influence during Phase One?

In the context of identifying signs of alcohol influence during Phase One, the correct answer is indeed "speedy response." Alcohol consumption typically affects cognitive and motor functions, leading to a decrease in reaction times rather than an increase. Individuals under the influence of alcohol often exhibit delayed processing and implementation of responses, resulting in slowed reactions, impaired judgment, and an overall decrease in coordination.

The other signs such as impaired vision, increased risk-taking behaviors, and slowed reactions are well-documented effects of alcohol's impact on the central nervous system. Impaired vision could manifest as difficulty focusing or decreased peripheral awareness, while increased risk-taking involves making impulsive decisions without fully considering the potential dangers. Slowed reactions are a direct result of alcohol's depressant effects, hindering the individual's ability to respond quickly and appropriately in various situations. Therefore, noting "speedy response" as a sign is inconsistent with the effects of alcohol, making it the correct choice in identifying what is NOT a common sign during Phase One.