Based on their research published in Adult Sibling Relationships, they talk about the differences between full and half siblings.
While half siblings and blended families are common now in the U.S., most academic research on family dynamics still tends to focus on siblings of the “full” variety, according to Geoffrey Greif, a professor at the University of Maryland School of Social Work and co-author of “Adult Sibling Relationships.”
“Half siblings have been the stepchild ― joke intended ― of sibs research because they are a more complicated topic to pursue in an already complicated topic,” he told HuffPost.
Read full article, https://www.huffpost.com/entry/read-this-if-you-think-half-siblings-are-not-real-siblings_l_654420c9e4b00f9ca31f31e0