A twin study reported that shared environmental effects (40%) were found to play a moderate role in relation to the symptoms of separation anxiety, and the parameter approached significance among 11 to 13-year-old males [ 5 ].
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A twin study reported that shared environmental effects (40%) were found to play a moderate role in relation to the symptoms of separation anxiety, and the parameter approached significance among 11 to 13-year-old males [ 5 ].