Abstract
In this chapter, we discuss issues of depth that are relevant to the concept and process of generalization. We clarify the following useful terms that are now commonly used in patterns research: abduction; induction; near generalization and far generalization; and deduction. We also explore nuances in the meaning of generalization that have been used in different contexts in the school mathematics curriculum. In the closing section, we begin to discuss implications of the findings in the chapter on our proposal of a theory of graded pattern generalization that we explore in some detail in Chap. 4.
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Notes
- 1.
As an aside, kindergarten students (ages 5–6 years) in the absence of formal learning experiences appear to consider deductive inferences as being more certain than inductive ones and other guesses (Pillow, Pearson, Hecht, & Bremer, 2010).
- 2.
Certainly, there can be an abduction without induction (i.e. abductive generalizations). Some geometry theorems, for example, do not need inductive verification. We do not explore these situations in this book in light of our interest on patterns. However, it is useful to note the insights of Pedemonte (2007) and Prusak, Hershkowitz, and Schwarz (2012) about the necessity of a structural continuity between an abduction argument process and its corresponding justification in the form of a logical proof. That is, a productive abductive process in whatever modal form (visual, verbal) should simultaneously convey the steps in a deductive proof.
- 3.
Polya (1973, pp. 17–22) recounts the story of Euler’s numeric-driven generalization of the infinite series \({\displaystyle \sum _{n=1}^{\infty }\frac{1}{{n}^{2}}}\)by initially establishing an analogical relationship between two different types of equations (i.e. a polynomial P of degree n having n distinct nonzero roots and a trigonometric equation that can be transformed algebraically into something like P but with an infinite number of terms). Euler’s abductive claim had him hypothesizing an anticipated solution drawn from similarities between the forms of the two equations. Upon inductively verifying that the initial four terms of the two equations were indeed the same, Euler concluded
that \({\displaystyle \sum _{n=1}^{\infty }\frac{1}{{n}^{2}}=\frac{{\pi }^{2}}{6}}\).
- 4.
See Pedemonte and Reid (2011) for a more refined analysis of different types of abductive action that support and hinder the construction of empirical arguments and deductive proofs.
- 5.
Clements and Sarama (2009) note that children from ages 2–7 years developmentally progress in their understanding of, and expertise in, patterns in the following manner: being pre-explicit patterners of everyday things, actions, etc. at age 2; being recognizers of simple repeating sequences of objects and consecutive counting numbers at age 3; being fillers (or fixers) and duplicators of repeating patterns at age 4; being extenders of repeating patterns at age 5; being core unit recognizers of repeating patterns at age 6; and being numeric patterners of growing patterns at age 7. My overall interpretation of this progression deals with transitions in elementary students’ ability to express an interpreted, stable, and unique core unit from the implicit (nonverbal, gestural, aided by concrete objects) to the explicit (verbal with and without aid of concrete objects) stage. I deal with this issue in some detail in Chaps. 5 and 6.
- 6.
We share Davydov’s (2008) view that “(g)eneralization is regarded as inseparably linked with the operation of abstraction” (p. 75). Hence, in this book, abstraction is treated as an operation that constructs conceptual generalizations.
- 7.
Certainly this view should be seen in Davydov’s (2008) larger perspective in which school curricula should aim for higher level theoretical consciousness and cognition beyond, and not merely, the formation of roots of empirical consciousness and cognition. While the empirical grounding is “important,” nonetheless, “at present [is] not the most effective way of developing [students’] minds” (p. 73).
- 8.
See Luria (1976, pp. 53–98) for details of his experimental studies in which he obtained the same patterns of generalized thinking schemes among different groups of adult subjects. In his closing remark relative to the studies, he notes how the “evidence assembled indicates that the processes used to render abstractions and generalizations does not assume an invariable form at all stage of mental growth” but “are themselves a product of socioeconomic and cultural development” (p. 98). Further, he stresses the possibility of transforming from situational, concrete, and practical to theoretical and abstract ways of generalizing via an evolving language whose meanings are enriched via, say, more education, new experiences, and new ideas.
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Rivera, F. (2013). Contexts of Generalization in School Mathematics. In: Teaching and Learning Patterns in School Mathematics. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-2712-0_2
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