What might explain why audience members are nodding with their eyes closed during Mr. Gibbons' presentation?

The observation of audience members nodding with their eyes closed during a presentation can indicate that they are listening intently. This behavior often suggests a deep engagement with the content being presented. When individuals close their eyes while nodding, they may be trying to block out distractions and concentrate more fully on the speaker’s message.

This focusing behavior often occurs if the content resonates with them or if they are processing complex information that requires their full attention. Therefore, the act of nodding expresses acknowledgment and agreement, while closing their eyes signifies a desire to immerse themselves in the auditory experience. This combination can be seen as a positive sign of attentiveness rather than a lack of interest or understanding.