What is Sibling?
{{redirect|Brother}} {{redirect|Sister}} [[File:William-Adolphe Bouguereau (1825-1905) - Two Sisters (1901).jpg|right|thumb|''Two Sisters'' created by [[William-Adolphe Bouguereau]].]] The '''siblings''' are the [[wikt:sister|sister]]s and [[wikt:brother|brother]]s of a person. == Types of siblings == There are several different types of siblings. * '''Full-Siblings''' ('''Full Brothers'''/'''Full Sisters''' or '''Brothers'''/'''Sisters'''): These types of siblings have both the same [[father]] and [[mother]] and are the most common type of siblings found. ** '''Twins''': There are two types of twins: [[Identical twins|identical]] and [[Fraternal twins|fraternal]]. Identical twins have exactly the same genes; fraternal twins are no more similar than regular siblings. Often, twins with a close relationship will develop a twin language from infant-hood, a language only shared and understood between the two. Studies suggest that identical twins appear to display more twin talk than fraternal twins. At about 3 years of age, twin talk usually ends.<ref>{{cite journal|last1=Hayashi|first1=C|last2=Mikami|first2=H|last3=Nishihara|first3=R|last4=Maeda|first4=C|last5=Hayakawa|first5=K|title=The relationship between twin language, twins' close ties, and social competence|journal=Twin Research and Human Genetics |date=2014|volume=17|issue=1|pages=27–37|doi=10.1017/thg.2013.83|pmid=24330841|s2cid=31514697}}</ref> Researchers were interested in subjects who were in the later years of life. They knew that past studies suggested that genetics played a larger role in one's personality in the earlier years of their life. However, they were curious about whether or not this was true later on in life. They gathered subjects with a mean age of 59, who included 99 pairs of identical twins, and 229 pairs of fraternal twins who were all reared apart. They also gathered twins who were reared together: 160 pairs of identical [[twin]]s, and 212 pairs of fraternal twins. They studied the most heritable traits in regard to personality, whic