This document discusses several factors that can influence second language acquisition:
1. Age - Younger learners acquire language faster but older learners learn at a faster rate. Adults have a disadvantage with pronunciation but an advantage in learning rate.
2. Aptitude - An individual's natural ability to learn language, consisting of abilities like identifying sound patterns and inferring rules. Aptitude contributes to but does not determine proficiency.
3. Motivation - A key factor in SLA, it can be integrative, instrumental, intrinsic, or extrinsic. Instrumental motivation tends to lead to better performance according to some research. Attitudes and motivation are interrelated and can change over time with external