Left- and Right-Brain Functioning
We have already observed that left- and right-brain dominance is a potentially significant issue in developing a theory of second language acquisition. As the child's brain matures, various functions become lateral-ized to the left or right hemisphere. The left hemisphere is associated with logical, analytical thought, with mathematical and linear processing of information. The right hemisphere perceives and remembers visual, tactile, and auditory images; it is more efficient in processing holistic, integrative, and emotional information. Torrance (1980) lists several characteristics of left-and right-brain dominance. (Illustration - 2.3).
While we can cite many differences between left- and right-brain characteristics, it is important to remember that the left and right hemispheres operate together as a "team." Through the corpus collosum, messages are sent back and forth so that both hemispheres are involved in most of the neurological activity of the human brain. Most problem solving involves the capacities of both hemispheres, and often the best solutions to problems are those in which each hemisphere has participated optimally. We must also remember Scovel's (1982) warning that left- and right-brain differences tend to draw more attention than the research warrants at the present time.
Illustration 2.3 - Left- and right-brain characteristics
Nevertheless, the left-/right-brain construct helps to define another useful learning style continuum, with implications for second language learning and teaching. Danesi (1988), for example, used "neurological bimodality" to analyze the way in which various language teaching methods have failed: by appealing too strongly to left-brain processes, past methods were inadequately stimulating important right-brain processes in the language classroom. Krashen, Seliger, and Hartnett (1974) found support for the hypothesis that left-brain-dominant second language learners preferred a deductive style of teaching, while right-brain-dominant learners appeared to be more successful in an inductive classroom environment. Stevick (1982) concluded that left-brain-dominant second language learners are better at producing separate words, gathering the specifics of language, carrying out sequences of operations, and dealing with abstraction, classification, labeling, and reorganization. Right-brain-dominant learners, on the other hand, appear to deal better with whole images (not with reshuffling parts), with generalizations, with metaphors, and with emotional reactions and artistic expressions. The role of the right hemisphere in second language learning was noted above. This may suggest a greater need to perceive whole meanings in those early stages, and to analyze and monitor oneself more in the later stages.
You may be asking yourself how left- and right-brain functioning differs from FI and FD. While few studies have set out explicitly to correlate the two factors, intuitive observation of learners and conclusions from studies of both hemispheric preference and FI show a strong relationship. Thus, in dealing with either type of cognitive style, we are dealing with two styles that are highly parallel. Conclusions that were drawn above for FI and FD generally apply well for left- and right-brain functioning, respectively.
Ambiguity Tolerance
A third style concerns the degree to which you are cognitively willing to tolerate ideas and propositions that run counter to your own belief system or structure of knowledge. Some people are, for example, relatively open-minded in accepting ideologies and events and facts that contradict their own views; they are more content than others to entertain and even internalize contradictory propositions. Others, more closed-minded and dogmatic, tend to reject items that are contradictory or slightly incongruent with their existing system; they wish to see every proposition fit into an acceptable place in their cognitive organization, and if it does not fit, it is rejected.
Again, advantages and disadvantages are present in each style. The person who is tolerant of ambiguity is free to entertain a number of innovative and creative possibilities and not be cognitively or affectively disturbed by ambiguity and uncertainty. In second language learning a great amount of apparently contradictory information is encountered: words that differ from the native language, rules that not only differ but that are internally inconsistent because of certain "exceptions," and sometimes a whole cultural system that is distant from that of the native culture. Successful language learning necessitates tolerance of such ambiguities, at least for interim periods or stages, during which time ambiguous items are given a chance to become resolved. On the other hand, too much tolerance of ambiguity can have a detrimental effect. People can become "wishy-washy," accepting virtually every proposition before them, not efficiently subsuming necessary facts into their cognitive organizational structure. Such excess tolerance has the effect of hampering or preventing meaningful sub-sumption of ideas. Linguistic rules, for example, might not be effectively integrated into a whole system; rather, they may be gulped down in meaningless chunks learned by rote.
Intolerance of ambiguity also has its advantages and disadvantages. A certain intolerance at an optimal level enables one to guard against the wishy-washiness referred to above, to close off avenues of hopeless possibilities, to reject entirely contradictory material, and to deal with the reality of the system that one has built. But intolerance can close the mind too soon, especially if ambiguity is perceived as a threat; the result is a rigid, dogmatic, brittle mind that is too narrow to be creative. This may be particularly harmful in second language learning.
A few research findings are available on this style in second language learning. Naiman et al. (1978) found that ambiguity tolerance was one of only two significant factors in predicting the success of their high school learners of French in Toronto. Chapelle and Roberts (1986) measured tolerance of ambiguity in learners of English as a second language in Illinois. They found that learners with a high tolerance for ambiguity were slightly more successful in certain language tasks. These findings suggest—though not strongly so—that ambiguity tolerance may be an important factor in second language learning. The findings have intuitive appeal. It is hard to imagine a compartmentalizer—a person who sees everything in black and white with no shades of gray—ever being successful in the overwhelmingly ambiguous process of learning a second language.
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