This commentary to the recent article by Musso et al. (2013) discusses issues related to model fitting, comparison of classification accuracy of generative and discriminative models, and two (or more) cultures of data modeling. We start by questioning the extremely high classification accuracy with an empirical data from a complex domain. There is…

Quantum mechanics is often thought to be a difficult subject to understand, not only in the complexity of its mathematics but also in its conceptual foundation. In this paper we emphasize students' depictions of the uncertainty principle and wave-particle duality of quantum events, phenomena that could serve as a foundation in building an…

We comment on Goldstein, Davidoff, and Roberson's replication and extension ("Journal of Experimental Child Psychology, 102", 219-238 [2009]) of our study of the effect of toddlers' color term knowledge on their categorical perception (CP) of color ("Journal of Experimental Child Psychology, 90", 114-141 [2005]). First, we discuss how best to…

In their paper "Unique Characteristics of Diagnostic Classification Models: A Comprehensive Review of the Current State-of-the-Art," Andre Rupp and Jonathan Templin (2008) provide a comparative analysis of selected psychometric models useful for the analysis of multidimensional data for purposes of diagnostic score reporting. Recent assessment…

The author was invited to prepare a commentary in response to the Lev-Wiesel manuscript titled "Intergenerational Transmission of Sexual Abuse? Motherhood in the Shadow of Incest." Lev-Wiesel's stated intent in the study was to understand an important issue, namely how is intra-familial sexual abuse perpetuated across successive generations. This…

In the mid-1960s, social scientists Barney Glaser and Anselm Strauss developed grounded theory as a systematic and rigorous method of qualitative data analysis leading to "the discovery of theory from data." In grounded theory, the researcher applies a set of coding procedures to the data until a provisional theory emerges inductively.…

Analyzes the application of levels of deficits or supports in the classification of mental retardation in published research. Analysis of data from three professional journals indicated that the supports model of classification has had no significant impact in subject descriptions reported in mental-retardation research. Implications for teacher…

Suggests structure based on two sets of principles for deriving meaning from data: Shannon's measure of entropy, which provides means of measuring amount of information in message; and Ranganathan's faceted classification scheme, which provides means of determining number of meaningful data. Syntax, meaning, and semantics of data are discussed.…

Problems in current special education categorical research practices are discussed in terms of consistency and reliability, student heterogeneity, and lack of distinct categorical groups. Suggested changes include characteristic-oriented categorization, corresponding changes in dissemination of research findings, and greater specificity and…

The history of the study of human mental ability is an example of the dialectic in social science between those who interpret data within the framework of existing social inequities and those who look for perspectives that might eventually dissolve inequities. The dedication of Henry Herbert Goddard to a belief in the scientific proof of…

Social area analysis (SAA) is defined, and its conceptual roots and principal applications identified. The utility of SAA is assessed by reviewing use of demographic data among several disciplines. Authors review seminal and recent contributions to the field. Ecological fallacies and other problematic facets of SAA are considered. (Author/DWH)

Examined are the political, historic, and economic influences in England and Wales affecting the categorization and labeling of pupils with special educational needs. The paper concludes that adoption of a non-categorical classification system has been unsuccessful in abolishing labeling, but has obfuscated statistical information reported by the…

In examining the issue of overrepresentation of minority students in special education, this article distinguishes between the percentage of category or program by group and percentage of group in category or program, which provide very different perspectives. Caution in interpreting data from the Office of Civil Rights relating "race/ethnicity"…

Information available on rural education remains startlingly inadequate--partly because of the great diversity of rural areas, because agencies responsible for data collection disagree on the definition of small/rural schools, and because large metropolitan schools have received far more than their share of attention, research, and financial…