“…In line with these arguments, it may be considered that the behavioral issues of adoptees are especially explained by their status which could also lead to a higher risk of low IQ (Behen, Helder, Rothermel, Solomon, & Chugani, 2008;Miller, Chan, Tirella, & Perrin, 2009), insecure attachment (Palacios et al, 2009;Rutter et al, 2007b;van den Dries, Juffer, van Ijzendoorn, & Bakermans-Kranenburg, 2009), and poor parenting and stress in the adopting family (Gagnon-Oosterwaal et al, 2012b;Judge, 2003;Palacios et al, 2009;Rijk, Hoksbergen, ter Laak, van Dijkum, & Robbroeckx, 2006;Sánchez-Sandoval & Palacios, 2012), leading to a higher cumulative score on average in adoptees than controls. In other words, by contrast with the cumulative effect hypothesis, adoptive status as a risk factor in isolation is held to be sufficient to derail adoptees' behavior.…”