A company pays its sales staff commissions based on the number of units they sell so that it can influence their performance. Which aspect of job performance is affected by this compensation structure?

Role perception pertains to an individual's understanding of their job responsibilities and expectations within an organization. While commissions may clarify the importance of sales in the overall business strategy, they do not inherently change how employees perceive their roles. Therefore, this aspect of job performance is not directly influenced by the compensation structure.

Job skill refers to the specific competencies and abilities required to perform job tasks effectively. While a commission structure might encourage employees to develop their sales skills over time, it does not directly affect the skills they currently possess. Thus, job skills remain a separate aspect of performance not altered by the compensation model.

Job aptitude is an individual's inherent ability to perform job-related tasks. This characteristic is largely innate and is not influenced by external factors such as compensation structures. Therefore, while commissions can motivate performance, they do not change a person's natural aptitude for their job.