Who is typically defined as an instructor in a laboratory setting?

In a laboratory setting, the term "instructor" is typically defined as someone who teaches or instructs students in labs. This definition encompasses a broad range of individuals who engage in educational activities within the laboratory environment. It is not limited to just academic titles; instead, it includes anyone who actively participates in the education process by guiding students, demonstrating techniques, and facilitating hands-on learning experiences.

This understanding is crucial because it recognizes the diverse roles that can contribute to effective teaching in a laboratory, including professors, graduate students, postdocs, and even experienced undergraduates. By embracing a broader definition of an instructor, laboratory programs can leverage the expertise of various individuals to enhance student learning and safety in the lab.

The other options provided are too restrictive or specific, leading to an incomplete understanding of who can fulfill the role of an instructor in a laboratory context. Only focusing on professors, lecturers, or graduate students limits the potential for diverse learning opportunities that other capable individuals can offer.