Recently, a debate has arisen around what can be called the "indistinguishability thesis," that is, the claim that it is impossible to distinguish between qualitative and quantitative research. In contrast, this article argues that the inability to define simple, sharp boundaries around qualitative and quantitative research does not…

Properly defining a population ensures that resources, such as funding and access, meet the needs, expectations, and intended outcomes for those represented. Ethical concerns arise when a target population, such as the English Language Learner population, is defined in numerous yet incomplete ways, and differently in research and in state policies…

Questions Husaim and Cohen's basic assumption that stimulus dimensions or attributes defined by the experimenter have psychological reality for infant subjects. Suggests that infants may perceive different attributes in the stimulus, or they may not articulate the stimulus into attributes at all. (Author/RH)

Argues that the item of first priority in general semantics research is to come up with a coherent framework for the overall organization of general semantics studies, and offers a few thoughts on beginning the search for a solution to this problem. (GT)

Despite much effort by scholars, the definition of play remains a problem. Observers of preschool children tend to rate constructive activities as play; this has implications for play criteria. Types of play recorded may be appreciably affected by the time frame of observations and the use or lack of supplementary interviews. (RH)

This paper summarizes results of a survey of 256,000 individuals in Spain which sought to identify those individuals with impairments, disabilities, and handicaps. The paper also examines the usefulness of the World Health Organization's classification. Results are discussed in terms of prevalence of disability, age, sex, common impairments,…

Analyzes and documents classification issues as part of the assessment of data quality in the Common Core of Data (CCD). Focuses on the Public Elementary/Secondary Education Agency Universe Survey. Indicates shortcomings in the definitions used for the CCD. (SLD)

This discussion of issues of definition and classification of attention deficit disorder (ADD) emphasizes the heterogeneity of the diagnosis, the overlap of ADD with reading disability, and lack of consistency across studies. A systematic classification study is proposed to develop a unitary, empirically derived classification for ADD. (Author/DB)

The double-deficit hypothesis of developmental dyslexia proposes that deficits in phonological processing and naming speed represent independent sources of dysfunction in dyslexia. The present article is a review of the evidence for the double-deficit hypothesis, including a discussion of recent findings related to the hypothesis. Studies in this…

Eleven indexes of rurality and their effect on the classification of Michigan's 83 counties were investigated. The indexes were based on different concepts of rurality: (1) percent of employment in agriculture, fishing, and forestry; (2) population density and distance to urban centers; and (3) economic conditions. Index rankings were compared to…

This paper argues that because estimates of the number of people with developmental dyslexia range from 3% to 20% of the population, it is imperative that educators be knowledgeable about dyslexia, including being up-to-date on the neuroanatomical dyslexia research. It then reviews neuroanatomical research, including findings from seminal research…

This handbook outlines procedures for evaluating a school guidance program. Defined first are the concept of guidance evaluation and basic terms in guidance evaluation. The purpose of guidance evaluation is discussed. Covered in a description of problems and difficulties in doing guidance evaluation are general problems; problems relating to…