“The classical support for as-if models in the social sciences stems from the economist Milton Friedman (1953), who, like the psychologist B. F. Skinner, saw little value in modeling cognitive processes. In contrast, our aim is to understand actual decision processes, not only the outcomes. There is a good reason for this. Without modeling the cognitive blade of Simon's scissors, it is utterly impossible to determine in what environments heuristics succeed, that is, their ecological rationality.”

— Gerd Gigerenzer , Heuristics

Gerd Gigerenzer, Ralph Hertwig, and Thorsten Pachur, Heuristics: The Foundations of Adaptive Behavior, 2015.

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German psychologist 1947

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“Models of bounded rationality describe how a judgement or decision is reached (that is, the heuristic processes or proximal mechanisms) rather than merely the outcome of the decision, and they describe the class of environments in which these heuristics will succeed or fail.”

Gerd Gigerenzer (1947) German psychologist

Gerd Gigerenzer and Reinhard Selten eds. Bounded Rationality: The Adaptive Toolbox. MIT Press, Cambridge MA. (2001), p. 4.

“Models of bounded rationality describe how a judgement or decision is reached (that is, the heuristic processes or proximal mechanisms) rather than merely the outcome of the decision, and they describe the class of environments in which these heuristics will succeed or fail.”

Reinhard Selten (1930–2016) German economist

Gerd Gigerenzer and Reinhard Selten eds. Bounded Rationality: The Adaptive Toolbox. MIT Press, Cambridge MA. (2001), p. 4

“The third model regards mind as an information processing system. This is the model of mind subscribed to by cognitive psychologists and also to some extent by the ego psychologists. Since an acquisition of information entails maximization of negative entropy and complexity, this model of mind assumes mind to be an open system.”

Thaddus E. Weckowicz (1919–2000) Canadian psychologist

Source: Models of Mental Illness (1984), p. 102

“When taken as a way of modeling cognitive architecture, connectionism really does represent an approach that is quite different from that of the classical cognitive science that it seeks to replace. Classical models of the mind were derived from the structure of Turing and Von Neumann machines. They are not, of course, committed to the details of these machines as exemplified in Turing's original formulation or in typical commercial computers—only to the basic idea that the kind of computing that is relevant to understanding cognition involves operations on symbols.. In contrast, connectionists propose to design systems that can exhibit intelligent behavior without storing, retrieving, or otherwise operating on structured symbolic expressions. The style of processing carried out in such models is thus strikingly unlike what goes on when conventional machines are computing some function.”

Jerry Fodor (1935–2017) American philosopher

Jerry A. Fodor, and Zenon W. Pylyshyn. "Connectionism and cognitive architecture: A critical analysis." Cognition 28.1-2 (1988): 3-71.

“When taken as a way of modeling cognitive architecture, connectionism really does represent an approach that is quite different from that of the classical cognitive science that it seeks to replace. Classical models of the mind were derived from the structure of Turing and Von Neumann machines. They are not, of course, committed to the details of these machines as exemplified in Turing's original formulation or in typical commercial computers—only to the basic idea that the kind of computing that is relevant to understanding cognition involves operations on symbols.. In contrast, connectionists propose to design systems that can exhibit intelligent behavior without storing, retrieving, or otherwise operating on structured symbolic expressions. The style of processing carried out in such models is thus strikingly unlike what goes on when conventional machines are computing some function.”

Zenon Pylyshyn (1937) Canadian philosopher

Jerry A. Fodor, and Zenon W. Pylyshyn. "Connectionism and cognitive architecture: A critical analysis." Cognition 28.1-2 (1988): 3-71.

“The fourth model of mind, closely related to the previous one, is the structuralist model, as represented by Piaget, Chomsky, Levi-Strauss, and the structural-developmental version of the psychoanalytical theory. This model assumes the presence of innate structures or potentialities to develop such structures. These structures are not directly experienced or observed; rather, they are inferred from the organization of cognitive processes and behaviour and also from the regularity and orderliness of development. The development proceeds through The development proceeds through well defined stages. There are two versions of the structuralist development model. In the preformist version, the structures exist in potential form at birth and only actualize themselves in the maturation-development process. In the epigenetic version, the structures develop in a dialectic interaction with the environment. The final outcome us not completely determined at births but also depends on the environmental factors.”

Thaddus E. Weckowicz (1919–2000) Canadian psychologist

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“In the past several years, social work has increasingly focused on an ecological model. This model integrates both treatment and reform by conceptualizing and emphasizing the dysfunctional transactions between people and their physical and social environments. Human beings are viewed as developing and adapting through transactions with all elements of their environments. An ecological model gives attention to both internal and external factors. It does not view people as passive reactors to their environments but, rather, as being involved in dynamic and reciprocal interactions with them.”

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Source: The practice of social work. (1995), p. 24

“Knowledge about the process being modeled starts fairly low, then increases as understanding is obtained and tapers off to a high value at the end.”

Harold Chestnut (1917–2001) American engineer

Source: Systems Engineering Tools, (1965), p. 130 cited in: Melvin Silverman (1996) The Technical Manager's Handbook: A Survival Guide. p. 74

“Reference models can be quite comprehensive, consisting of hundreds or thousands of model objects. This is why various levels of aggregation are used. Reference models provide enterprises with an initial process engineering solution, letting them determine the degree of detail of the model and the business content.”

August-Wilhelm Scheer (1941) German business theorist

Source: ARIS architecture and reference models for business process management (2000), p. 380.

“As is used in connection with systems engineering, a model is a qualitative or quantitative representation of a process or endeavor that shows the effects of those factors which are significant for the purposes being considered. Modeling is the process of making a model. Although the model may not represent the actual phenomenon in all respects, it does describe the essential inputs, outputs, and internal characteristics, as well as provide an indication of environmental conditions similar to those of actual equipment.”

Harold Chestnut (1917–2001) American engineer

Source: Systems Engineering Tools, (1965), p. 108; As cited in: Alberto Ortiz (1992, p. 13)

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