A study of the effects of the children's television program Sesame Street showed that preschoolers with the lowest initial academic skills (e.g., ability to recognize letters of the alphabet) gained more over a season of viewing than other children. The effects of the program in this study are most likely to be confounded with the effects of

Question

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Statistical regression is likely confounding the effects because children with initially low skills might naturally show more improvement over time due to regression towards the mean, rather than solely due to the program.

A Study of the Effects of the Children's Television Program