To what extent do factors such as age at migration, length of time elapsed since emigration, or age at testing determine how far a speaker will attrite? This chapter will investigate the impact of such personal background variables for the attritional process.

NOTE

The controversy about this issue goes back at least fifty years, and centres on a simple question: Is there a stage in human development (situated around the onset of puberty and often called the ‘Critical Period’) when a language-specific maturational change takes places in the brain, which makes language learning through the original, dedicated processes impossible and forces older learners to develop compensatory strategies? Or are older learners hampered by an accumulation of factors which are more general? These factors may include the fact that the higher level of cognitive development and analytical skills that older learners draw upon is more suitable for the acquisition of other types of knowledge, but can hamper language acquisition. Also, of course, our ability to learn and memorize things generally deteriorates as we get older.