Our current capacity to understand or provide a context for interpreting the size of an effect in education program evaluation is limited. To address the problem, this study proposes a time-indexed effect size metric (d') to estimate how long it would take for an "untreated" control group to reach the treatment group outcome in terms…

The present research represents a test of the effect of adding seriation instruction to oddity instruction to produce an advantage in both forms of abstraction. Pasnak et al. (2007) and Kidd, Pasnak, Gadzichowski, Ferral-Like, & Gallington (2008) have shown that at risk kindergartners profit academically from instruction in both oddity and…