Lorraine says, "I don't like those people because they are different from me and my friends." Using psychological terminology, Lorraine's comment has identified the people she doesn't like as:

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Lorraine's comment suggests that she sees the other people as belonging to an "out-group" because they are different from her and her friends. In-group refers to a group to which an individual belongs and with which they share certain commonalities, while an out-group is a group to which an individual does not belong and may be perceived as different or "other." Side-group and dumped group are not recognized psychological terms.

Lorraine Says, "I Don't Like Those People Because They Are