This manual provides guidance and documentation for users of the longitudinal kindergarten-fourth grade (K-4) public-use data file of the Early Childhood Longitudinal Study, Kindergarten Class of 2010-11 (ECLS-K:2011), which includes the first release of the public version of the third-grade data. This manual mainly provides information specific…

Results of five experiments in which adults and children were exposed to two study strategies for vocabulary learning: (1) repetition of words with meanings and (2) associative elaboration (the keyword method). Subjects were asked to choose one of the two study methods for learning a 24-item list of new vocabulary words. (SL)

This 4-year longitudinal study of logical reasoning found complex interrelationships among different cognitive processes of children ages 6 to 15. Piaget's stage theory is discussed in the introduction, with a focus on the concrete operational stage in middle childhood. In the study, a representative array of logical concept tasks and short-term…