Tracking the first two seconds: three stages of visual information processing?

We compared visual priming and comparison tasks to assess information processing of a stimulus during the first 2 s after its onset. In both tasks, a 13-ms prime was followed at varying SOAs by a 40-ms probe. In the priming task, observers identified the probe as rapidly and accurately as possible; in the comparison task, observers determined as rapidly and accurately as possible whether or not the probe and prime were identical. Priming effects attained a maximum at an SOA of 133 ms and then declined monotonically to zero by 700 ms, indicating reliance on relatively brief visuosensory (iconic) memory. In contrast, the comparison effects yielded a multiphasic function, showing a maximum at 0 ms followed by a minimum at 133 ms, followed in turn by a maximum at 240 ms and another minimum at 720 ms, and finally a third maximum at 1,200 ms before declining thereafter. The results indicate three stages of prime processing that we take to correspond to iconic visible persistence, iconic informational persistence, and visual working memory, with the first two used in the priming task and all three in the comparison task. These stages are related to stages presumed to underlie stimulus processing in other tasks, such as those giving rise to the attentional blink.     

Order of strokes writing as a cue for retrieval in reading chinese characters

Abstract

Chinese characters are composed of a number of strokes, varying from 1 to 23. The strokes of each character have to be written in a precise order, which is codified in a number of rules, and which is learned in the process of literacy acquisition. The present study tested the hypothesis that stroke writing order has been coded in memory as an essential component of the orthographic knowledge of a character, and that this specific motor schema is used as a cue in lexical retrieval. In the first experiment reported here, fragments of Chinese characters consisting of “early” or of “late” strokes (namely strokes which are written first or last during writing) were pre-exposed to target characters to be named as fast as possible. The results indicated that “early” strokes were better retrieval cues for character names than “late” strokes. In the second experiment, subjects were requested to make same-different judgements about two characters which had in common either “early” or “late” strokes. Different characters sharing “early” strokes were more frequently erroneously judged as being identical than characters sharing “late” strokes.     

On the paradox of reversible processes in thermodynamics

This paper discusses an argument by Norton (in: European Philosophy of Science—Philosophy of Science in Europe and the Viennese Heritage, Vienna Circle Institute Yearbook, vol 17, Springer, Dordrecht, pp 197–210, 2014, 2016) to the effect that reversible processes in thermodynamics have paradoxical character, due to the infinite-time limit. For Norton, one can “dispel the fog of paradox” by adopting a distinction between idealizations and approximations, which he himself puts forward. Accordingly, reversible processes ought to be regarded as approximations, rather than idealizations. Here, we critically assess his proposal. In doing so, we offer a resolution of his alleged paradox based on the original work by Tatiana Ehrenfest-Afanassjeva on the foundations of thermodynamics.

     

Is there a memory for sentences?

A critical discussion of the model of sentence memory which enjoyed greatest popularity in the psycholinguistic research of the sixties, namely the model based on the deep-structure-plus-tag hypothesis of sentence memory, is presented together with the results of an experiment on prompted recall for sentences with various intervals after presentation and with two types of instructions. This experiment contributed to show that immediate memory for sentences can be affected by appropriate instructions, and that after a short time after presentation only the main semantic information of the sentences is recalled. An alternative model is presented, based on the notion of storage of the meaningful elements of the sentences in a rather abstract form, and of recall as a reconstructive process to produce new sentences. The results of two new experiments on sentence memory, the first a free and prompted recall experiment with children, the second a recognition memory study with adolescents, are then presented and discussed in relation to the model.     

Autocritica filosofica e critica storica in J.-P. Sartre

Summary In this essay the author examines Sartre's attitude toward Marxism as related to his existentialism and his approach to history. Existentialism, from a methodological point of view, has been of much avail as an ideology rooted in personal freedom. Still, judging it from a Marxist point of view, Sartre has criticized existentialism for a) its theoretical limits (it is abstract, nonhistorical, non-dialectic); and b) its ethical and political faults, since it is self-defeating and almost exclusively leaning toward privacy. And yet one has to note how Sartre neglected to point out that existentialism's theoretical limits are due not only to its non-dialectical foundations but also to its nonscientific character and its hidden religiousness. Moreover, Sartre has not properly considered its historical value as a struggle against metaphysical thought and against a farfetched use of science. Basically — and apart from the views stated in such articles as Les Communistes et la paix — Sartre's Marxism is, from a political and ideological standpoint, strongly biased toward Soviet Marxism and socialism, since its main emphasis is anti-dogmatic and humanistic. Above all, this basic attitude could be explained by the negative influences of some historical and political events of the 40s and 50s on the development of his thought. As a matter of fact, his Marxism grew up against the background of Soviet politics in the Stalin and post-Stalin eras. Therefore, he refuses to accept any dogmatic and deterministic images of Marxism; instead of dogma he affirms the relevance of problems; in lieu of given truths, a concern for moral demands. In so doing, Sartre has based his Marxism more on the subjective praxis than on nature and history naturalistically viewed.     

Potential Originality and Effectiveness: The Dynamic Definition of Creativity

Given the central role of creativity in the future post-information society, a call for a pragmatist approach to the study of creativity is advocated, that brings as a consequence the recognition of the dynamic nature of this phenomenon. At the foundation of the proposed new theoretical framework lies the definition of creativity itself, which is turned from static to dynamic through the introduction of the concept of potential originality and effectiveness. Starting from this central definition, and through the introduction of the auxiliary definitions for focus area, creativity goal, creative agent, creative potential of an agent, creative potential of an environment, creative process, product of a creative process, creativity potential of a process, representation of the product of a creative process, and estimator, we arrive at the definitions of creative achievement and creative inconclusiveness. Although both aspects are key in the creative process, creative inconclusiveness was not part of previous definitions, but it is argued that its role is fundamental for effective education in creativity. The new definitions are shown to have full backward compatibility with the extant corpus of scientific research in creativity, as well as forward effectiveness in suggesting novel investigation approaches to support the consideration of new theoretical hypotheses.