also administer other sacraments in the process of conversion such as confirmation. Some Evangelical Christians, like Baptist, and Pentecostals, do not believe baptism is necessary for salvation and conversion, but only that a profession of faith is enough. Christians also differ on how old someone must be to convert. More traditional groups of Christians believe conversion is not restricted to age, and tend to baptize infants. Instructions Before conversion takes place, converts, also called "catechumens", must undergo a period of instruction. In the Catholic Church, this usually involves spending a few months preparing in RCIA (Rite of Christian Initiation of Adults), where catechumens spend time learning about the Christian faith and the teachings of the Bible and the Church. In the Orthodox Church, it can take up to a full year of studying and participation before one is baptized. Protestant denominations and other Christian groups have various other ways of instructing converts which may focus heavily on the Bible. Baptism/Confirmation There are different modes of baptism in Christianity, these include immersion, affusion (pouring), and aspersion (sprinkling). The way in which a person is baptized depends on the denomination one enters. Almost all baptisms share in common the use of the Trinitarian formula (in the name of the Father, Son, and Holy Spirit) by the minister while baptizing the convert. The Roman Catholic Church primarily baptizes with affusion but occasionally does so with immersion. Orthodox Christians and some Eastern Catholics baptize by triple immersion upon invocation of the Trinity; the only time the Orthodox Church permits other forms of baptism is in the case of an emergency. Protestants baptize in a number of different ways. Many Anglicans and Lutherans baptize by affusion, whereas Presbyterians and Congregationalists typically baptize with aspersion. Others, like Methodists, may conduct all three forms of baptism. Many Evangelical Protestants insist that only full immersion baptism is valid, basing this on the New Testament Greek word for baptism "baptizo" (βαπτίζω) which can be translated as "dipping" or "submersion." Depending on which of these denominations one enters, the sacrament of Confirmation, also known as Chrismation by eastern Christians, may be immediately administered after the baptism. In the Latin Catholic Church, infants who are baptized are not confirmed, but instead must wait until they're in their teens to be confirmed. In the Eastern Orthodox Church, and many Eastern Catholic Churches, infants are Chrismated and communed by a priest or bishop