Which of the following is NOT a mental skill required for effective performance?

The reason "directing choreography" is not considered a mental skill required for effective performance is that it pertains more to the role of a choreographer than to the performance aspect itself. While directors and choreographers certainly need to employ various mental skills such as creativity, organization, and vision when crafting a dance, they are not directly engaged in the performance of that dance.

In contrast, the other choices reflect mental skills that dancers utilize during their performance. Accurate expression of emotion is crucial for conveying the story or intent behind the dance, engaging the audience effectively. The successful demonstration of physical skills requires an understanding of timing, rhythm, and the emotional underpinnings of the movement, blending physical ability with mental awareness. Maintaining focus during performance is vital for a dancer to deliver their piece effectively, ensuring they stay present and connected to the music and their fellow performers. These elements are integral to a dancer's mental approach and overall performance success.