Monolingual Catalan or monolingual Spanish (that, when they were small spoke only one of the two languages at home). Age between 18 and 35 years.
The study takes only 15 minutes and consists of three phases. The first phase is a basic training with an auditory discrimination task. In the second phase, you will hear a Martian language during 10 minutes. In the last phase, you will need to detect which of the words you will hear belong to such peculiar language.