Second language
A second language is a language spoken in addition to one's first language. A second language may be a neighbouring language, another language of the speaker's home country, or a foreign language.
A speaker's dominant language, which is the language a speaker uses most or is most comfortable with, is not necessarily the speaker's first language. For example, the Canadian census defines first language for its purposes as "What is the language that this person first learned at home in childhood and still understands?", recognizing that for some, the earliest language may be lost, a process known as language attrition. This can happen when young children start school or move to a new language environment.
Second-language acquisition
The distinction between acquiring and learning was made by Stephen Krashen as part of his monitor theory. According to Krashen, the acquisition of a language is a natural process; whereas learning a language is a conscious one. In the former, the student needs to partake in natural communicative situations. In the latter, error correction is present, as is the study of grammatical rules isolated from natural language. Not all educators in second language education agree to this distinction; however, the study of how a second language is learned/acquired is referred to as second-language acquisition.Research in SLA "...focuses on the developing knowledge and use of a language by children and adults who already know at least one other language... a knowledge of second-language acquisition may help educational policy makers set more realistic goals for programmes for both foreign language courses and the learning of the majority language by minority language children and adults."
SLA has been influenced by both linguistic and psychological theories. One of the dominant linguistic theories hypothesizes that a device or module of sorts in the brain contains innate knowledge. Many psychological theories, on the other hand, hypothesize that cognitive mechanisms, responsible for much of human learning, process language.
Other dominant theories and points of research include 2nd language acquisition studies, verbal behaviour, morpheme studies, behaviourism, error analysis, stages and order of acquisition, structuralism, 1st language acquisition studies, contrastive analysis and inter-language.
These theories have all influenced second-language teaching and pedagogy. There are many different methods of second-language teaching, many of which stem directly from a particular theory. Common methods are the grammar-translation method, the direct method, the audio-lingual method, the Silent Way, suggestopedia, community language learning, the total physical response method, and the communicative approach. Some of these approaches are more popular than others, and are viewed to be more effective. Most language teachers do not use one singular style, but will use a mix in their teaching. This provides a more balanced approach to teaching and helps students of a variety of learning styles succeed.
Effect of age
The defining difference between a first language and a second language is the age the person learned the language. For example, linguist Eric Lenneberg used second language to mean a language consciously acquired or used by its speaker after puberty. In most cases, people never achieve the same level of fluency and comprehension in their second languages as in their first language. These views are closely associated with the critical period hypothesis.In acquiring an L2, Hyltenstam found that around the age of six or seven seemed to be a cut-off point for bilinguals to achieve native-like proficiency. After that age, L2 learners could get near-native-like-ness but their language would, while consisting of few actual errors, have enough errors to set them apart from the L1 group. The inability of some subjects to achieve native-like proficiency must be seen in relation to the age of onset. Later, Hyltenstam & Abrahamsson modified their age cut-offs to argue that after childhood, in general, it becomes more and more difficult to acquire native-like-ness, but that there is no cut-off point in particular.
As more knowledge is gained about the brain, there is a hypothesis that when a child is going through puberty, that is the time that accents start. Before a child goes through puberty, the chemical processes in the brain are more geared towards language and social communication. Whereas after puberty, the ability for learning a language without an accent has been rerouted to function in another area of the brain—most likely in the frontal lobe area promoting cognitive functions, or in the neural system of hormone allocated for reproduction and sexual organ growth.
As far as the relationship between age and eventual attainment in SLA is concerned, Krashen, Long, and Scarcella, say that people who encounter foreign language in early age, begin natural exposure to second languages and obtain better proficiency than those who learn the second language as an adult. However, when it comes to the relationship between age and rate SLA, "Adults proceed through early stages of syntactic and morphological development faster than children ". Also, "older children acquire faster than younger children do ". In other words, adults and older children are fast learners when it comes to the initial stage of foreign language education.
Gauthier and Genesee have done research which mainly focuses on the second language acquisition of internationally adopted children and results show that early experiences of one language of children can affect their ability to acquire a second language, and usually children learn their second language slower and weaker even during the critical period.
As for the fluency, it is better to do foreign language education at an early age, but being exposed to a foreign language since an early age causes a "weak identification". Such issue leads to a "double sense of national belonging," that makes one not sure of where they belong to because, according to Brian A. Jacob, multicultural education affects students' "relations, attitudes, and behaviors". And as children learn more and more foreign languages, children start to adapt, and get absorbed into the foreign culture that they "undertake to describe themselves in ways that engage with representations others have made". Due to such factors, learning foreign languages at an early age may incur one's perspective of his or her native country.
Similarities and differences between learned and native proficiency
Speed
Acquiring a second language can be a lifelong learning process for many. Despite persistent efforts, most learners of a second language will never become fully native-like in it, although with practice considerable fluency can be achieved. However, children by around the age of 5 have more or less mastered their first language with the exception of vocabulary and a few grammatical structures, and the process is relatively very fast because language is a very complex skill. Moreover, if children start to learn a second language when they are seven years old or younger, they will also be fully fluent with their second language in a faster speed comparing to the speed of learning by adults who start to learn a second language later in their life.Correction
In the first language, children do not respond to systematic correction. Furthermore, children who have limited input still acquire the first language, which is a significant difference between input and output. Children are exposed to a language environment of errors and lack of correction but they end up having the capacity to figure out the grammatical rules. Error correction does not seem to have a direct influence on learning a second language. Instruction may affect the rate of learning, but the stages remain the same. Adolescents and adults who know the rule are faster than those who do not.In the learning of a second language the correction of errors remains a controversial topic with many differing schools of thought. Throughout the last century much advancement has been made in research on the correction of students' errors. In the 1950s and 1960s, the viewpoint of the day was that all errors must be corrected at all costs. Little thought went to students' feelings or self-esteem in regards to this constant correction.
In the 1970s, Dulay and Burt's studies showed that learners acquire grammar forms and structures in a pre-determined, inalterable order, and that teaching or correcting styles would not change that.
In 1977, Terrell"s studies showing that there were more factors to be considered in the classroom than the cognitive processing of the students. He contested that the affective side of students and their self-esteem were equally important to the teaching process.
In the 1980s, the strict grammar and corrective approach of the 1950s became obsolete. Researchers asserted that correction was often unnecessary and that instead of furthering students' learning it was hindering them. The main concern at this time was relieving student stress and creating a warm environment for them. Stephen Krashen was a big proponent in this hands-off approach to error correction.
The 1990s brought back the familiar idea that explicit grammar instruction and error correction was indeed useful for the SLA process. At this time, more research started to be undertaken to determine exactly which kinds of corrections are the most useful for students. In 1998, Lyster concluded that "recasts", the teacher repeating a student's incorrect utterance with the correct version, are not always the most useful because students do not notice the correction. His studies in 2002 showed that students learn better when teachers help students recognize and correct their own errors. Mackey, Gas and McDonough had similar findings in 2000 and attributed the success of this method to the student's active participation in the corrective processes.