Given the lack of inherent uniqueness of the middleborn child, we hypothesized that middleborn adults would be more likely to express their roles in terms of physical distance and separation of themselves from their families and therefore tend to move farther away from home than their firstborn and lastborn siblings. A chi-squared analysis assessed the frequency of participants living farthest from both mother and father for middleborns versus all other birth-order positions. The frequency of middleborns living farther from their parents' homes was not significantly higher than frequencies of siblings of other birth-order positions when ethnicity was not controlled. There was a significant difference for Hispanic participants when ethnicity was controlled, with a significantly higher frequency of middleborns living farther from home than siblings of other birth-order positions.
