True or False: Someone under the influence of Diazepam will typically have average pupil size.

Individuals under the influence of Diazepam, a benzodiazepine, generally exhibit average pupil size, as this substance does not have a significant impact on pupil dilation or constriction. Unlike some other drugs that can cause noticeable changes in pupil size, benzodiazepines primarily have central nervous system depressant effects without leading to pronounced mydriasis (dilation of pupils) or miosis (constriction of pupils). Since the question is asking whether those under Diazepam's influence will typically have average pupil size, the correct response confirms that this is indeed the case.

In contrast, certain other medications or substances can create more pronounced effects on pupil size, leading to either larger or smaller pupils, which is why this aspect is significant when assessing someone suspected of substance impairment.