Riese M L
University of Louisville School of Medicine, Department of Pediatrics, Kentucky.
J Dev Behav Pediatr. 1994 Oct;15(5):342-7.
To examine the significance of relative birth weight of cotwins for neonatal temperament, 70 pairs of full-term twins who were at least 15% discordant for birth weight were assessed. The assessment focused on irritability, resistance to soothing, activity, reactivity, and reinforcement value. The larger twin of the pair was more irritable, more difficult to soothe, more active while awake, more active during sleep, less reactive to visual and auditory stimuli, and less reinforcing to the examiner than the smaller cotwin. Both the lighter and heavier cotwins exhibited behavioral discrepancies. The results are discussed in relation to prenatal influences on early behavioral development, and implications for differential parent-infant interaction with each twin.
为了研究双生子相对出生体重对新生儿气质的重要性，我们评估了70对足月双胞胎，他们的出生体重差异至少为15%。评估集中在易怒性、安抚抗拒性、活动度、反应性和强化价值上。与较小的双生子相比，较大的双生子更易怒、更难安抚、清醒时更活跃、睡眠时更活跃、对视觉和听觉刺激的反应性更低，对检查者的强化作用也更小。较轻和较重的双生子都表现出行为差异。我们将结合产前对早期行为发展的影响以及对与每个双生子进行差异化亲子互动的影响来讨论这些结果。
