For me, the most interesting hypothesis that we were introduced to in this lecture was The Affective Filter Hypothesis. This is the idea that emotional variables can have an effect and prevent someone from learning a language. These include motivation, self-confidence, and anxiety. The lower the affective filter, the more language the student will acquire. This shows that a child with low self-confidence may not pick up a language as easily as a child with high self-confidence. According to the ONS Child and Adolescent Mental Health Survey (2004), 2.2% or about 96,000 children have an anxiety disorder. This shows that most likely, teachers will be faced with the challenge of trying to teach a language to a child who cannot acquire it as easily as the other children in the class. However, Krashen claims[A3] that children do not have the same affective filter as adults but also experience differences related to the affective filters. An affective filter only accounts for individual variation in language acquisition, it cannot be applied to all children.