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Q46: In Piaget's terminology, sensorimotor stage two is
Q61: Cigarette smoking is implicated in _ percent
Q73: Research with three-month-old infants demonstrates that _
Q105: As of 2008, the rate of low-birthweight
Q111: The phenomenon in which fathers experience symptoms
Q174: _ is the understanding that objects continue
Q253: What factors spur the development of theory
Q271: In the United States, low-income children are
Q274: What is one effect of lower infant
Q283: Conservation refers to a child's assumption that