Entangled in the womb? A pilot study on the possible physiological connectedness between identical twins with different embryonic backgrounds

Studies of synchronous physiological responses to startle stimuli between monozygotic twins and other paired subjects have suffered from methodological flaws such as post-hoc specifications of "connectedness" criteria. The mechanisms that affect any such connectedness are unknown. With the logistic and financial support of a television company, we conducted a methodological pilot study with predefined objective hit criteria in which we used four pairs of twins with frequent experiences of connectedness.