Cable and New Media

Mary Alice Mayer Phillips' CATV: A History of Community Antenna Television (Evanston, Ill.: Northwestern University Press, 1972—$9.75)     

A Longitudinal Study of Intralimb Coordination in the First Year of Independent Walking: A Dynamical Systems Analysis

Using a dynamical systems approach, we examined the development of intralimb coordination over the first year of independent walking. The segmental motion of the thigh and shank and their intralimb coordinative relationship were modeled dynamically as a system of coupled limit cycles. To test the predictions of such a dynamic model in the development of intralimb coordination, 3 infants were filmed from the onset of their first upright independent walking steps, and weekly for the next month and then every month thereafter until they had been walking for 1 year. 3 adults also were included for comparison. Analysis of the kinematics data derived from the film revealed that at the emergence of walking, the limit cycle system displayed instability in several aspects. With walking experience, however, the limit cycle regime became more attractive, such that by 3 months of walking the infants appeared to have found an adult-like stable coordinative relationship between the 2 segments. This pattern of instability followed by stability is consisted with the transitional behaviors of dynamical systems. Several potential control parameters are discussed that might contribute to the stabilization of the walking behavior. The utility of employing a dynamical systems approach for understanding developing behavioral systems is discussed.     

Parent Praise to 1‐ to 3‐Year‐Olds Predicts Children's Motivational Frameworks 5 Years Later

In laboratory studies, praising children's effort encourages them to adopt incremental motivational frameworks—they believe ability is malleable, attribute success to hard work, enjoy challenges, and generate strategies for improvement. In contrast, praising children's inherent abilities encourages them to adopt fixed‐ability frameworks. Does the praise parents spontaneously give children at home show the same effects? Although parents' early praise of inherent characteristics was not associated with children's later fixed‐ability frameworks, parents' praise of children's effort at 14–38 months (N = 53) did predict incremental frameworks at 7–8 years, suggesting that causal mechanisms identified in experimental work may be operating in home environments.     

Social-emotional effects of early childhood education programs in Tulsa

This article assesses the effects of Tulsa, Oklahoma's early childhood education programs on social-emotional outcomes, examining teacher ratings of children's behavior from the Adjustment Scales for Preschool Intervention and a measure of attentiveness using fixed effects regressions with propensity score matching. The sample includes 2,832 kindergarten students in 2006, of whom 1,318 participated in the Tulsa Public Schools (TPS) pre-K program and 363 participated in the CAP of Tulsa County Head Start program the previous year. Program participation was associated with lower timidity and higher attentiveness for TPS pre-K alumni and a marginally significant reduction in timidity for Head Start alumni. Results were similar for the free lunch-eligible subsample. We conclude that high-quality, school-based preschool programs can enhance social-emotional development.     

Evaluating the future value of educational interventions in a health care setting

Program evaluation is intended to systematically determine the merit and worth of a program. We broadly define merit and worth to include economic perspectives obtained through the analysis of the finances of a program—both the costs and the benefits. A study reported here addressed the cost and benefit of investing in an educational intervention to change and improve processes in a health care setting. The potential economic impact of a training intervention intended to improve the uptake of a new purchasing process was evaluated. The study illustrates economic evaluation that anticipates the future value of educational interventions, a prospective view.