Web site logical path: [www.psy.gla.ac.uk] [~steve] [this page]
This should be obvious to us. Textbooks for the last 50 years use copious expensive illustrations (but don't abandon the main text); many disciplines (most sciences, history of art, ....) routinely not only use but require both pictures and text in almost every paper.
Is this like Spontaneous Conceptions (often called "misconceptions")? Is it like the recurring error of thinking that technology causes learning?
They also all tend to believe something I think is quite wrong.
(A better researched, but less sceptical, view is contained in this literature review: Coffield et al. (2004)).
What continually astonishes me is that everyone assumes we should create multiple versions of materials for teaching, but assumes exactly the opposite when we are writing: there we assume we should edit our writing as far as possible so that everyone can understand it.
Similarly, no-one who believes this could ever give a talk about it without being a blatant hypocrite: surely you believe that the audience will contain people with different learning styles, and that your talk would only be good for some and disadvantage the rest of us? In reality of course such talks are fine: because there is no reason to assume that a competent speaker can only adapt their talk for half the audience. But this is contrary to the assumption.
"If you travel with us you will have to learn things you do not want to learn
in ways you do not want to learn".
[Doris Lessing; Nobel Laureate for literature; from a letter replying to a
reader. Quoted in Alan Yentob's "Imagine" programme on Doris Lessing,
broadcast Tues 27 May 2008, 10:35pm on BBC1 ]
Despite this, note that Cronbach & Snow (ch.11 p.375ff.) say that cognitive styles cannot logically (or do they mean methodologically?) be distinguished from traits or abilities. (All you can do is to measure how well people do on various specific tasks; and then see to what extent scores on one test/task go with (predict, correlate with) scores on another.)
Learners also differ from each other in more subject-specific aptitudes for learning e.g. some being better at verbal than numerical things, others vice versa. Subscales of IQ tests and other tests can show this. These differences between learners are not learning styles, and don't imply differences in how to create material, but that a given learner is often quicker at learning some kind of topic than others.
These graphs show two equivalent views of the same imaginary 4 data points, representing the mean learning scores for 4 groups.
This central point and others are elaborated carefully in: Cronbach,L.J. & Snow,R.E. (1977) Aptitudes and instructional methods: A handbook for research on interactions (New York: Irvington Publishers Inc).
Informally, we could think of this as studying the interaction (or interference, good and bad) of alternative learning styles with alternative teaching styles. They call this "aptitude-treatment interactions", which is careful, technical, and general terminology. "Interaction" is a statistical term meaning that there is some crossover effect besides the "main effects" of differences in general learning ability in learners, and differences in teaching quality in different teaching materials. "Aptitude" refers to any kind of special learning ability that varies between individuals. "Treatment" refers to any teaching intervention in a study: whether different material, different tutor actions, etc.
People get the impression from that book that no such effects have been found. However Gordon Pask did demonstrate such an effect. E.g. Pask, G. (1976) "Styles and strategies of learning" British Journal of Educational Psychology vol.46 pp.128-148. (A much longer list of publications by Pask is given in a later section.) A more recent study with clear crossovers is that by Shute (1993). She makes the point that the failure in many early studies to get a crossover was because they did classroom studies that didn't (couldn't) control other variables; but that if you use computer instruction for single learners (as Pask did and she did) then you can. This point cuts both ways: if you want to study such effects and the underlying causal factors, then that is the way to do the research; but on the other hand it equally implies that the effects are not big enough to have much effect in classroom education (though computer based learning and/or distance learning could be different in this respect).
If you do such an experiment and get not a crossover, but two lines of very different slope, then statistically this is still an interaction (a conditional outcome that depend on both the learning and the teaching style). However it would no longer be of the same practical interest: e.g. suppose in the left graph, line A was horizontal i.e. point 3 was near point 2. That would mean that although teaching material B was only good for one kind of learner, material A was good for both, and it would no longer be sensible to have different materials for different learners: you would only want to use material A.
(Val Shute told me that "ordinal interaction" is the proper term for this latter effect where the lines don't cross (one always better than the other); while what I called here a "crossover effect" is technically a "disordinal interaction". Details on this here (use your browser's Find command for "disordinal").)
Many people without thought assume we should produce different sets of learning materials, each optimised for each different learning style. This does not follow.
In this book (in ch.12 and around p.292), Landauer argues that in many current user interfaces there is a big variation in user performance because it depends on certain mental skills. He says that many designers conclude that they should provide different designs for different users. He argues however that that is quite wrong. It is the case that many designers have unusual mental skills and have produced interfaces that require these skills, but that it is quite possible to produce designs that are good for everyone, not just a mental elite, and on which everyone performs as well as the best do on current interfaces.
The analogous argument for education is, again, that we should produce materials that are optimal for everyone. An experiment that shows a crossover effect may establish that learning styles exist with an effect on performance for those materials. But this can not show that the effect will exist for all possible materials: instead, perhaps teachers (like user interface designers) should try to develop materials that are equally successful for all styles of learning.
In this context, he lists as approaches:
It is almost certainly true that learning to learn makes a considerable difference to every learner: most can get better at learning, not by magically growing their IQ, but by improving their skills at learning. Furthermore it is likely that a given method of learning may allow a learner to do well at only certain kinds of material, while another learning method would be better for other types of material. It follows that you may well find a crossover effect because in your participants some had one learning method, others another, and your materials gave different advantages depending on the learning method applied. However if you retrained your participants so that they could all use either learning method and were able to select and apply the best one for a given material, then the crossover effect would vanish. Even if you find (crossover) evidence that learners currently have different learning methods/styles, this does not show that these couldn't be changed — perhaps quite easily.
I believe that Pask thinks this is the case (but you should check this out).
If true, this means that it does NOT follow from establishing a crossover effect that teachers should produce alternative versions of material. Instead, they should train learners to have more than one learning method, so that all can benefit from the same material, and indeed so that all can benefit from a range of styles of material.
Thus it is my provisional opinion that the topic of "learning styles" is based entirely on a recurrent mistake that concludes from the fact that there are important and relevant differences between individual learners that educators should design different materials for different types of learner. My opinion is not based on a thorough reading of the recent literature. To form your own judgement, you should do that: starting points are provided below in the links to web sites.
A more moderate view is that of Pask, who says in the conclusion of a review paper (Pask 1988) "It seems evident that distinctive learning strategies exist. ... There are also certain distinct styles, or dispositions to adopt classes of strategy. ... However I am still perplexed by the extent to which some individuals persist in using the same strategy across contexts. ... Also, some persons seem more flexible, versatile, and context-sensitive than do other persons."
The core issue for teaching methods and materials is going to be how easy or hard it is to change:
But in addition, we cannot neglect (as I used to think we could) the whole issue of learning and cognitive styles and traits, because it has now been shown that many of the tests and exam questions we produce in fact perform differently for different learning styles, thus measuring something different from what they are meant to.
Finally learning styles are just one part of a more fundamental issue. Should teachers adapt to learners, or learners to teachers? The answer is "both"; and the concept to think of is that of learning communities. All (institutional) learning can be thought of from a wholly social perspective, as one of the learner joining a community, and becoming enculturated. From that point of view, the learner needs to do the adapting, and the more they do so, the more they gain access to that subculture and its knowledge.
The complementary viewpoint is that teachers should adapt, not so much to individuals, as to the broadest audience possible; to make their material accessible to the most people. The best writers can do this — indeed, learning to write is largely the process of overcoming "egocentricity", and learning how to make your private thoughts comprehensible to others with different experience. That is part of a teacher's job too.
Caveats here include:
A possible logical distinction might be:
Despite this, note that Cronbach & Snow (ch.11 p.375ff.) say that cognitive styles cannot logically (or do they mean methodologically?) be distinguished from traits or abilities. (All you can do is to measure how well people do on various specific tasks; and then see to what extent scores on one test/task go with (predict, correlate with) scores on another.)
(The notes below are taken from messages to ITFORUM.)
An excellent resource is Jonassen and Grabowski's Handbook of Individual Differences in Learning and Instruction. It defines learning styles and cognitive styles (my explanation is adapted from it), and gives an overview of the different styles that have been identified, and summarizes research related to each style.
Here's a web site from the Maisie Center that has a good list of resources: http://www.masie.com/new/lrnstyls.htm
1. As we develop, we prefer the presentation of information in a progression from psychomotor or kinetic to audio and visual to abstract representations. The implication is that for the very young, the most effective presentation of information would be psychomotor.
2. Then we develop a general preference for one or more of the three categories of information presentation. The implication is that some prefer their encounters with the world in a highly kinetic way: surgeons, athletes, short-order cooks, etc. Or, if we are abstract takers of the world we may insist on reading the book about tennis to learn the sport. [joke]
3. An interesting interpretation of these ideas is that the first point may apply to a person regardless of chronological age but according to "novelty of the subject matter to an individual." This you might refer to a relative age. The implication is that a person with an abstract preference who is middle-aged may be better served with a psychomotor presentation of information if it is highly novel to him or her. In other words, a person with a literary preference may still be better served, as would a child, with a psychomotor presentation of breadmaking. At the same time, knowing that the individual has an abstract bent, an instructor can supplement the early learning with articles on dough kneading techniques.
Disclaimer: I may be off in my recollection of the theory.
Try this site as well: http://snow.utoronto.ca/Learn2/introll.html
Another similar issue is that all generalisations should be conveyed by both specific examples or cases and a statement of the generalisation. Everyone needs both, though some may be more tolerant than others of the omission of one or the other.
Kolb's learning styles could in my view be similarly regarded: as a set that all learners should cover and which should all be equally though separately supported in properly designed material. (For an sketch, see this.)
Turkle & Papert (1991) argue that there are 2 styles of thinking and learning: abstract and concrete. P.175 they say that for Piaget "mature thinking is abstract thinking ...[but for Turkle and Papert] formal reasoning is not a stage, but a style." And they make clear that this can also be important for learning e.g. LOGO was designed to offer a way into mathematics for concrete thinkers who have no other way in at all. But I myself think that this interesting and important contrast is neither about developmental maturity nor a style, but identifies two kinds of thinking both of which should be supported in any well designed learning and teaching about a topic. They describe, no doubt correctly, the strong preferences for one over the other that many people exhibit. But for me, when a person with a broken toe exhibits a strong preference for resting their weight on the other foot, this is not an argument against healing the toe or expecting them to walk one-legged for the rest of their life. When teachers push only one aspect then this is like forcing learners to hop one-legged and is equally unbalanced and perverse. For me, the challenge is to identify what the two apsects are for each topic, and how to teach them. Thus computing science lectures almost entirely on the abstract pre-planning approach and fails to teach what they all know is important in reaility: how to debug programs, how to use debugging tools, how to develop programs "middle out" from a simple but complete working version to a complex working version.
In a normal 1:1 face to face conversation, both parties "coordinate" and adapt the language they use to an extent researchers are only beginning to notice and document. On the other hand, we have discovered in the last two millennia that language can be used successfully to transmit ideas even when frozen by writing. It is not as easy to read Plato as to listen to a good personal philosophy tutor, but it is quite possible. So how much of the effort of meeting half way should a) the teacher b) the learner do?
Part of the issue is cost and teaching ratios. (If only 1/40th of the teacher has been paid for the benefit of each individual learner, then the learner may have to do most of the adaptation.)
But more fundamentally something else is going on. Part of learning a subject, e.g. "physics" or "medicine" is learning the language used by experts: so if the learner doesn't do the adapting by learning how to join that language community, they won't really learn the subject. This is a situativity perspective: learning as joining a community. In the end, a teacher can't do this for a learner. (See also Feynman on how, in the end, to understand physics you have to grapple with the math: it cannot be translated into a human natural language, even by an outstanding communicator doing lectures specially constructed for a non-specialist audience. R.Feynman "The character of physical law: a series of lectures" 1965 — ch.2 I think for the relationship of math to physics.)
One level of abstraction up, education in general is trying to connect learners to the now enormous body of socially distributed knowledge. Teaching them to be able to access and mine that for themselves, using whatever communicative conventions that body uses, is the real job. Producing specially translated digests may get them some special information, but doesn't help the big goal. I understand that the best current evidence (as seen from the UK) is that small class sizes have a demonstrable benefit for the first 3 years of school, but ONLY for that (even though 'most everyone feels small class sizes are naturally desirable for everyone all the time). I interpret that as the induction period, when it is vital to get diverse children aligned with the education system, and teachers need to make big efforts with personal services. Again, aligning the learners is important for them and their future, rather than aligning teachers and materials for the benefit of unchanging individual characters.
So I think that holding out for materials that are good for almost all learners, rather than going for a tower of Babel solution of multiple differently adapted materials fits in with the fundamental requirements of education and forging a WW community of knowledge. Now within all that there is still a huge and difficult brief for teachers: scaffolding learners as they try to connect with a given knowledge community, scaffolding their personal learning work in finding personally meaningful connections between that and their personal experience, and finding how to create materials that "work" for many types of learner at once, rather than only for the teacher or the subset of learners most like the teacher. But note how this is essentially the same as the work done by both "great" and commercially successful novelists, painters, film makers: they find how to create things that mean something to a wide range of different individuals. One of the big lessons I feel I've learned about novels, is how the best ones mean such different things to different people, who agree only in that it was worth reading. (See the preface to the second edition of "The Golden Notebook" by Doris Lessing for one fascinating illustration of this.)
For example, those learners who are well past, and did not have the benefit of, those first three years of small class sizes. Are they to be excluded from task communities because they can't use the existing materials to acquire the terminology? Or can communities become more open by leveraging educational research to facilitate integration? I'm reminded that the medical education community is using new representations to facilitate learners acquiring diagnostic skills (model-based reasoning) that not all got from existing materials. Maybe dynamic and spatial visualization is not as mutable as we would like.
Or those situations with immediate training needs where performance outcomes need to be maximized and training times need to be minimized. Such as, hypothetically, training rescuers for survivors of devastating earthquakes.
Or material that needs to be known by all learners, not just most. Such as the social prohibition on murder, or how to protect against AIDS.
I haven't exhaustively researched all the characteristics, but I believe some learning characteristics are malleable, some may be amenable to coping strategies, and there are likely to be some things that cannot be overcome (at the extreme: blindness and deafness). For instance, despite the controversy, there do seem to be quantitative differences on cognitive abilities between individuals. I'm consequently inclined to believe there should also be some redundancy in the materials. Let me restate that as flexibility in the materials.
One issue is definitely cost, whether adapting the teacher or adapting the materials. In the technology case however, you might amortize the cost, grabbing the best representations from eclectic sources, making it affordable. If you first specify (and yes, we need research) what the things are that make up a good design, including the minimum multiplicity needed, you can design to it. If you balance the breadth of representation with some real practicality in development costs, can you not hit both targets?
With as many textbooks there are in any given area, certainly the content and different representations are probably already available somewhere. Can we make a mechanism to characterize and pull together relevant different representations? See, for example, Tom Murray's 1998 paper on this topic: 'A Model for Distributed Curriculum on the World Wide Web' in the Journal of Interactive Media in Education.
So, I agree that there are and will be many situations where we want to ensure learners have the greatest ability to self learn, which includes Steve's goal of 'aligning the learners', and that we will need to develop a design that works well for most learners. But I will also argue that we should also strive to understand and learn how to develop learning materials that work for ALL learners.
Clark Quinn 24 Aug 1999
Knowledge Universe Interactive Studio
cnquinn@knowledgeu.com
"We are always on shaky ground when considering cultural differences. It is vital to examine how culture may influence learning and achievement in school, but the danger lies in overgeneralizing its effects" (Nieto, 2000, p. 140). To illustrate the "shaky ground," we discuss one attribute of learning styles, the characteristics of field dependence (more recently, this is referred to as field sensitivity) and field independence. Bennett (1995) indicates that learners with a more field dependent style tend to have a more global view, are more sensitive with "highly developed social skills," and are extrinsically motivated. Field independent learners may be better able to perceive discrete parts, are more individualistic, and are more intrinsically motivated. Shade (1997) summarizes that African-Americans tend to be more field dependent whereas Euro-centric students tend to be more field independent. Bennett (1995) also indicates that "Mexican Americans tend to be relatively field dependent or global in orientation" (p. 168).
Field dependent learners tend to favor a "spectator approach" to learning and field independent learners tend to favor "inquiry" approaches (Bennett, 1995). Is it possible that a particular theory of instruction, such as Reigeluth's Elaboration Theory, is appropriate for designing instruction for some minority groups that have a more field dependent learning style? If some African-Americans tend to be more social and relational in learning styles (field dependent), they may learn more productively with interactive, collaborative situations, but not be as successful with inquiry/Socratic learning situations and with competitive educational methods. Euro-centric students may learn more successfully in inquiry learning situations and individual-based situations, but have more difficulty with collaborative situations.
In her case study of computer use, Chisholm (1996) discusses problems of computer access, but goes beyond that to note learning style differences among a culturally diverse group of young students. Chisholm identified the following cultural themes that emerged in the use of computers:
The students whose cultures value cooperation and interdependence, such as the Mexican-Americans and the African-Americans, could work and share with others. Those whose cultures value independence and self-reliance, such as the white culture, could work alone. Whereas those whose native culture tends to look at the world holistically, such as the Mexican-Americans, could explore and learn through play, those from cultures valuing analytic thinking could learn in a step-by-step deductive fashion (p. 171).
These propositions are not intended to highlight cultural "deficiencies," but to highlight strengths. We are familiar with the literature that indicates the importance of using a variety of learning styles and teaching styles. The argument, however, is that education in the United States has tended to focus on learning styles for the Euro-centric students' competitive, inquiry-driven, and independent work. A vital caution — where we are standing on shaky ground — is in the "misapplication of learning style theories" (Nieto, 2000, p. 143). Nieto summarizes studies in which teachers made incorrect assumptions. For example, in one study, Flora Ida Ortiz indicated that teachers assumed Hispanic students would not want to assume leadership roles in the class activities; thus teachers did not provide the Hispanic students with opportunities they provided to non-Hispanic students. Nieto indicates there is particular promise with Howard Gardner's multiple intelligence theory "in challenging current assessment practices that focus almost exclusively on logical-mathematical and linguistic intelligence" (p. 144).
CSE publications list: this has a subsection called "learning styles".
Biblography at the "learning styles network"
Learning styles: reading list, page: http://www.masie.com/new/lrnstyls.htm
Another useful page: http://csrnet.org/csrnet/articles/web-learning-styles.html
Another introductory page: http://www.Funderstanding.com/learning_theory_how6.html
Learning styles page: http://snow.utoronto.ca/Learn2/lstyle2.htm
Learning Styles http://www.cyg.net/~jblackmo/diglib/styl.html
Bibliography; http://www.cyg.net/~jblackmo/diglib/bibl.html
The book jacket to Pask's 1975 Cybernetics book says he has over 80 papers, besides books; and has quite a lot of refs to himself. Obviously this is only a selection.
Pask, G. (1957) "A teaching machine for radar training" Auomation progress April pp.214-217 [Earliest ref. in Pask 1975).]
Pask, G. (1961) An approach to cybernetics (London: Hutchinson)
Pask, G. (1965) "Comments on the organisation of men, machines, and concepts" in Education for information science (ed.) L.Heilprin et al. p.133 (London: Macmillan)
Pask, G. (1967) "The control of learning in small subsystems of programmed educational system" IRE trans. human factors election vol.8 pp.88-
Pask, G. (1968) "A cybernetic model for some types of learning and mentation" in Cybernetic problems in bionics (eds.) H.C.Oestreicher & D.R.Moore p.531-585 (London: Gordon and Breach)
Pask, G. & Lewis,B.N. (1968) "The use of a null-point method to study the acquisition of simple and complex transformation skills" Brit.J.Math. statistical psychology vol.21 pp.61-83
Pask, G. (1969) "Strategy, competence and conversation as determinants of learning" Programmed learning Oct. pp.250-
Pask, G. (1969) "Adaptive machines" Proc. NATO symposium major trends in programmed learning research Oct. pp.251- (Paris: Dunod)
Pask, G. (1969) "Interaction between a teaching machine and the student's attention directing systems" Proc. 16th int. congress applied psychology Oct. pp.269- (Amsterdam: Swets & Zeitlinger)
Pask, G. (1970) "Computer assisted learning and teaching" Paper at NCET
conf. on computer based learning, Leeds.
Pask, G. (1970) "Fundamental aspects of educational technology (illustrated
by the principles of conversational systems)" Proc. IFIP world conference
on computer eductation, part 1 (ed.) B.Scheepmaker
Pask, G. (1971) Behavioural cybernetics (?)
Pask, G. (1971) "Teaching machines" in Modern trends in education (ed.) B.Rose (London: Macmillan)
Pask, G. & Scott,B.C.E. (1971/2) "Learning and teaching strategies in a transformation skill" Brit.J.Math. statistical psychology vol.24 pp.205-229
Pask, G. (1971) "A cybernetic experimental method and its underlying philosophy" IJMMS vol.3 pp.279-337
Pask, G. (1972) "A fresh look at cognition and the individual" International Journal of Man-Machine studies vol.4 pp.211-216
Pask, G. & Scott,B.C.E. (1972) "Learning strategies and individual competence" International Journal of Man-Machine studies vol.4 pp.217-253
Pask, G. & Scott,B.C.E. (1973) "CASTE: a system for exhibiting learning strategies and regulating uncertainties" International Journal of Man-Machine studies vol.5 pp.17-52
Pask, G. (1975) Conversation, cognition and learning: a cybernetic theory and method (New York: Elsevier) [Pask says this is the basic one]
Pask, G. (1975) The cybernetics of human learning and performance (London: Hutchinson)
Pask, G. (1976) Conversation theory: applications in education and epistemology (New York: Elsevier) [Opaque; follow-on from Conversation, cognition and learning]
Pask, G. (1976a) "Conversational techniques in the study and practice of education" B.J.Educ.Psych. vol.46 pp.12-25
Pask, G. (1976b) "Styles and strategies of learning" B.J.Educ.Psych. vol.46 pp.128-148
Pask, G. (1983) Knowledge and innovation of decision makers: final technical report (London: US Army research institute)
Pask, G. (1984) "Review of conversation theory and a protologic (or protolanguage) Lp" Educational communications and technology journal vol.32 no.1 pp.3-40
Pask, G. (1988) "Learning strategies, teaching strategies, and conceptual or learning style" ch.4 pp.83-100 (New York: Plenum) in R.R.Schmeck (ed.) Learning strategies and learning styles ch.4 pp.83-100 (New York: Plenum) [Seems the best overview]
Carroll,J.B. Cronbach Pashler Pask 1976, 1988 Shute
J.B. Carroll Human Cognitive Abilities: A survey of factor-analytic studies [Clark Quinn says: provides an alternative take than Jonassen & Grabowski]
Coffield, F., Moseley, D., Hall, E. & Ecclestone, K. (2004) Learning styles and pedagogy in post-16 learning: A systematic and critical review (Learning and Research Skills Centre). Or try this link, or this.
Cowards et al. (2012) "Examining the Effect of Gender and Presentation Mode on
Learning from a Multimedia Presentation"
http://www.revistashipatia.com/index.php/generos/article/viewFile/96/170
Cronbach,L.J. & Snow,R.E. (1977) Aptitudes and instructional methods: A handbook for research on interactions (New York: Irvington Publishers Inc).
Egan,D.E. & Gomez,L.M. (1985) "Assaying, isolating and accommodating individual differences in learning a complex skill" vol.2 ch.? pp.207 R.F.Dillon (ed.) Individual differences in cognition (Academic Press: New York)
Egan,D.E. (1988) "Individual differences in human-computer interaction" ch.24 pp.543-568 M.Helander (ed.) Handbook of Human-Computer Interaction (North-Holland: London)
David H. Jonassen & Barbara L. Grabowski (1993) Handbook of Individual Differences, Learning and Instruction Lawrence Erlbaum Assoc; ISBN: 0805814132) [I haven't read this, but several people recommend it.]
Landauer,T.K. (1995) The trouble with computers: Usefulness, usability, and productivity (MIT press; Cambridge, MA)
Martin,D.J., Lucek,L.E., & Fuentes,S. (1999) "Issues of feminism and multicultural education for educational technology" ["Published" on ITFORUM on 8 Nov 1999.]
Pashler,H., Mark McDaniel, Doug Rohrer, and Robert Bjork (2008) Learning Styles: Concepts and Evidence Psychological Science in the public interest vol.9 no.3 pp.105-119
Pask, G. (1976) "Styles and strategies of learning" B.J.Educ.Psych. vol.46 pp.128-148.
Pask, G. (1988) "Learning strategies, teaching strategies, and conceptual or learning style" ch.4 pp.83-100 (New York: Plenum) in R.R.Schmeck (ed.) Learning strategies and learning styles ch.4 pp.83-100 (New York: Plenum)
V.J.Shute (1993) "A comparison of learning environments: All that glitters ..." in S.P.Lajoie & S.J.Derry (eds.) Computers as cognitive tools pp.47-74 (Erlbaum: Hillsdale, New Jersey) PDF
Witkin,H.A., Goodenough,D.R., Moore,C.A. & Cox,P.W. (1977) "Field-dependent and field-independent cognitive styles and their educational implications" Review of educational research vol.47 no.1 pp.1-64
Witkin,H.A. & Goodenough,D.R. (1981) Cognitive styles: essence and origins of field dependence and field independence (New York: International university press).
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