Trends in research are changes in ... what exactly? Porter and Laney point out that this could involve changes in topics studied, in what groups of indivduals are the subjects of research, or in methodologies. It could also involve trends in wider questions about the nature of research and the ways research and researchers are viewed. Such views could, in turn, have implications for topic selections and choice of methods. Trends in all of these areas of activity are discussed to a greater or lesser extent in this chapter.
Shifting research paradigms?
The traditional distinction between quantitative and qualitative research is problematic, for reasons that will not be elaborated on here. Another distinction involves epistemological beliefs of the researcher - does the researcher conceive of knowledge as a collection of facts, or as an understanding of the meanings that studied subjects ascribe to elements of their world? While research paradigms such as positivist, post-positivist, constructivist, participatory and emancipatory can be enumerated, the boundaries between them are less than clear, and different authors have classified the same research in different ways. These distinctions can not therefore be ignored, as
Different paradigms have different ways of identifying sources of bias" (p. 30),and further
This has important implications for those researchers who advocate the use of mixed methodologies, and the taking of a purely pragmatic approach to research design as it requires them to recognize and use distinctively [different?] ways of ensuring the worthiness of their research. (p. 30)
Traditional approaches to research The influences of the disciplines of psychology and psychiatry have been evident in the predominance of "positivist designs," and
The debates have centered on technical methodological issues rather than philosophical ones and have been firmly linked to questions of how we might best understand 'the condition.' (p. 30.)As for topics of interest and research activity, three stand out:
- description of groups and the nature of their difficulties,
- aetiologies, and
- amelioration or intervention.
One debate that had particular implications for developments in research methodology is the one between deficit theory and developmental theory: Is the appropriate object of research "to discover the differences that are the result of the learning disability" (p. 31), or rather to study the successive stages of development of skills and behaviors in any one individual? Some aspects of this question are discussed in a separate entry on Dorothy Howie's Models and Morals, in which she "draws links between research approaches and the way in which needs are conceptualized" (p. 32) and also outlines ecological theory and the discursive model.
Less traditional approaches to research: The last two research approaches discussed by Howie mark a shift from the former two's focus on the disabled child as the primary, perhaps the sole, object of study. The Ecological Model explicitly and specifically seeks to study the child's home, school and societal environments, to address the fact that
remarkably little research has been published on the interactions of severely and profoundly mentally handicapped individuals in natural settings. (Hogg and Mittler (1980) p. 15, quoted on p. 33)In a similar vein, Clarke and Evans5
... call for future investigations on the impact of 'powerful and prolonged ecological change' thus shifting from a study simply of individual variables to include systemic ones. (p. 33)Finally, aspects of the Discursive Model described by Howie are mirrored in other calls for "a more participatory and emancipatory form of research" (p.33), in which the understandings and priorities of the persons studied are more specifically solicited, and where there is "a focus on understanding the social lives and experiences of people... " (p. 33)
Topic Changes
Have the topics selected for study changed? Changes in research paradigms and methodologies have great influence on what questions are thought to be feasible, ethical and interesting to pursue, and shifts in educational and health policy may steer decisions about research. If research has been
too retrospective, tied to investigating the impact of such changes rather than helping to determine future policy, (p. 35)what topics should be selected for study to yield the kinds of insights sought? If inclusion and self-determination for people with learning difficulties is legislated, what needs to be investigated in order to determine whether legal obligations are in fact met?
Meanwhile, changes in medical knowledge about genetics and brain functions also drives selections of topics, and "aetiological aspects of learning difficulties continue to be an area for publication" (p. 35). Conversely, the finding such as the one that
persons with mental retardation are at increased risk for psychiatric illness and severe behavioral dysfunction (Dykens and Hoddapp (2001) p. 50, quoted on p. 36)may motivate research on characteristics of persons with learning disabilities.
A Review of Trends from 1990/91 to 2000/01
Porter and Lacey provide a lot of detail on how they selected publications from these two years for the purpose of identifying trends, and this methodological discussion together with most of the remainder of the chapter will be omitted. Some scattered findings:
- There are fewer studies, but a larger proportion of the studies include empirical data.
- The terminology changed over this decade, with the incidence of "retardation" and "handicap" dropping to virtually zero and the occurrence of "disability" more or less doubling.
- More research was published on autism, and the later research includes more work on services and interventions, while the earlier work concentrates on brain function and genetics. There were fewer publications on Down's syndrome.
- There was a decrease in the number of studies concerned with developmental issues issues; however, while 2/3 of these studies were "carried out with broad, non-aetiological groups of learners ... all of the later studies were aetiology specific"1 (p. 40).
- Research related to instructional methods increased from 17% to 22% of the studies. The proportion of these that dealt with challenging behavior decreased.
- Very little research is done in either year on curriculum-related topics, and this lack of interest may reflect the fact that curriculum has become centrally prescribed.
- There was less research with implications for health services, and more on provision of social services. Education got about the same amount of attention in both years, with some 10-15% of research.2
- Studies on inclusion in education dropped from 10% to 3%.
- "[F]ew authors adopt anything other than positivist or post-positivist approaches to research ... despite the development of new paradigms there has been little discernible change in the way research is seen in the field of learning difficulties." (p. 42)
- Survey designs dominate3, together with experimental and quasi-experimental strategies.4
Porter and Lacey note that their data on topics and methodologies in the actual publications of the beginning and end of this decade do not reflect the shifts that have occurred in the debates about paradigms and priorities. They discuss possible reasons for this in rounding off the chapter.
Notes:
- Commenting on this finding, Porter and Lacey ask:
Does this imply that we are no longer asking questions about how children with learning difficulties develop particular skills? ... developmental issues continue to be important for psychologists, not least because of what they may tell us about development per se... p. 40
- "Educational research ... remains a neglected area for empirical research -- at least with respect to pupils with learning difficulties." (p. 41)
- Porter and Lacey discuss many limitations of surveys as research tools.
- Most of these studies were small-scale, often single case studies. While some researchers have strongly argued for studies with group sizes larger than 20,
The difficulty of constituting a sufficiently homogeneous group of people with profound and multiple learning difficulties, of pre-specifying the detail of the methodology of intervention and the importance of micro levels of analysis of outcomes especially with respect to progress, militate against the use of larger-scale studies. (p. 44)
- Combatting Mental Handicap — A Multidisciplinary Approach (1990) edited by Peter L. C. Evans & Alan D. B. Clarke