A worker who can be counted on to complete assigned tasks without constant supervision is said to have what quality?

The quality described in the question is best captured by the concept of reliability. A worker deemed reliable consistently delivers results and meets expectations, indicating that others can trust them to complete their tasks effectively without the need for ongoing oversight. This trait is essential in many work environments, as it fosters confidence among colleagues and supervisors that the individual will fulfill their responsibilities.

While dependability can appear similar, it often refers to a person's steadfastness in being present and available, aligning closely with reliability but not encompassing the broader idea of completing tasks consistently. Independence emphasizes a worker's ability to function autonomously but does not inherently imply the consistent performance expected in task completion. Initiative suggests a proactive attitude towards taking on tasks or seeking out additional responsibilities, which is an admirable quality but does not specifically address the ability to complete assigned tasks reliably without supervision. Therefore, reliability is the most fitting answer in this context.