By comparing behavior within pairs of dizygotic twins (fraternal twins) with that of pairs of monozygotic twins (identical twins), researchers can determine if monozygotic twins are more similar on a particular trait, on average, than dizygotic twins
Indicate whether the statement is true or false.
True
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In laboratory experiments in which the dogs had developed learned helplessness, an effective method that helped the animals regain "hope" and feelings of control over the environment involved
a. having the dogs make "friends" with one of the experimenters. b. forcibly "dragging" the dogs into the "safe" compartment. c. providing food treats every time they were shocked. d. lowering the voltage of the shocks.
In a long-term study of heroin users, about ______ of the subjects were dead by age 46, with drug overdose being the most common cause of death.
A. 25% B. 50% C. 75% D. 90%
In a series of studies using the violation-of-expectation method, Renée Baillargeon and her collaborators claimed to have found evidence for __________ in the first few months of life
A) assimilation B) mental representation C) object permanence D) equilibrium
Modern definitions of successful aging have shifted the focus toward
A) specific achievements and physical characteristics. B) the processes older adults use to reach personally valued goals. C) easily measurable outcomes, such as the absence of disabilities. D) cognitive performance and creative achievements.