Which of the following is NOT one of the factors that influence adult learning?

When considering the factors that influence adult learning, experience, education, and physical condition play significant roles. Experience is vital because adults bring a wealth of knowledge and practical situations to the learning environment, which enhances their ability to grasp new concepts and relate them to real-life applications. Education affects an adult's learning as prior schooling and training can determine their foundational knowledge and learning styles. Physical condition can impact the capacity to engage with learning materials and participate actively in training sessions, as it can affect concentration and stamina.

Age, while it is a demographic factor that can affect the learning process, is not necessarily a definitive influence on how adults learn. Instead, adult learning theories emphasize that the process is more about the individual's environment, life experiences, readiness to learn, and motivation rather than their age alone. Therefore, age is not typically categorized as a core influencing factor when considering the specifics of adult learning principles.