Which psychophysical indicator is associated with dissociative anesthetic use?

The psychophysical indicator associated with dissociative anesthetic use is rigid muscles. Dissociative anesthetics, such as ketamine, can lead to a state where the user experiences a disconnection from their environment and self. This state can be accompanied by muscle rigidity, which may be a result of the drug's effects on the central nervous system. Increased muscle tone or rigidity can affect a person's motor functions, making it difficult for them to move freely.

In contrast, the other indicators noted do not typically align with the effects of dissociative anesthetics. For example, increased perception of time is often associated with hallucinogens rather than dissociative substances. Strong reflexes and improved coordination would contradict the expected impact of dissociative anesthetics, which generally impair motor skills and reflexes due to their depressant effects on the brain's signaling pathways. Thus, recognizing muscle rigidity as a key indicator allows law enforcement and medical personnel to identify potential substance influence in individuals.