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van IJzendoorn, Marinus H.; Bakermans-Kranenburg, Marian J. – Developmental Psychology, 2012
Reviewing the studies on differential susceptibility presented in this section, we argue that the time is ripe to go beyond correlational designs to differential susceptibility experiments. In such experiments, randomization prevents hidden moderator effects on the environment and guarantees the independence of moderator and outcome, while the…
Descriptors: Evidence, Genetics, Infants, Attachment Behavior
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Torppa, Minna; Poikkeus, Anna-Maija; Laakso, Marja-Leena; Eklund, Kenneth; Lyytinen, Heikki – Developmental Psychology, 2006
The authors examined the developmental trajectories of children's early letter knowledge in relation to measures spanning and encompassing their prior language-related and cognitive measures and environmental factors and their subsequent Grade 1 reading achievement. Letter knowledge was assessed longitudinally at ages 4.5, 5.0, 5.5, and 6.5…
Descriptors: Grade 1, Language Skills, Reading Achievement, Control Groups