Psychologists have had an interest in the cognitive processes involved with language that dates back to the 1870s, when Carl Wernicke proposed a model for the mental processing of language. Current work on language within the field of cognitive psychology varies widely. Cognitive psychologists may study language acquisition, individual components of language formation (like phonemes), how language use is involved in mood, or numerous other related areas.
Significant work has been done recently with regard to understanding the timing of language acquisition and how it can be used to determine if a child has, or is at risk of, developing a learning disability. A study from 2012, showed that while this can be an effective strategy, it is important that those making evaluations include all relevant information when making their assessments. Factors such as individual variability, socioeconomic status, short term and long term memory capacity, and others must be included in order to make valid assessments.
Language is really important for our life, without language nobody can communicate which each other. Language not only from our speaking, but also can be by body language. The example is when someone say to another is she or he is feeling sad. She or he without speaking “I am sad”, but they just keeping silent and looking bad mood. So here, we are as psychologist not only studying about language that spoken but everything that can be connecting with language. I think, that all my opinion about this.