This article presents an overview of quantitative methodologies for the study of stage-sequential development based on extensions of Markov chain modeling. Four methods are presented that exemplify the flexibility of this approach: the manifest Markov model, the latent Markov model, latent transition analysis, and the mixture latent Markov model.…

Early childhood instruction and the experiences that accompany can serve life-long lessons. Depriving children of education during this critical period in life can have significant consequences on cognitive, socio-emotional, and physical development. This article features one of the forerunners to special education, Michael Anagnostopoulos…