Two further applications of differentiation theory

Practice and transfer of practice in an auditory localization task were observed for three different information conditions (normal, transformed and reduced) to examine four aspects of Gibson's (1969) differentiation theory of perceptual learning and development. Support was found for the propositions that: (i) dimensions of difference, rather than prototypes, are learned; (ii) specificity is a more appropriate response measure than number of correct responses; (iii) perceptual learning will occur regardless of whether feedback is given or not; (iv) transfer of practice will be greater if dimensions of difference (as opposed to prototypes) are learned. It was also found that feedback during practice did not affect transfer. In an apparent contradiction though, specificity increased in the absence of dimensions of difference. This increase was interpreted as being associated with the detection of non-task-related information and was seen as lending support to Gibson's hypothesis that, perceptual learning is motivated by intrinsic cognitive drive and is terminated by a reduction in subjective uncertainty.

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On Weak Vitali Covering Properties

Canadian Mathematical Bulletin ◽

10.4153/cmb-1978-059-2 ◽

1978 ◽

Vol 21 (3) ◽

pp. 339-345 ◽

Cited By ~ 1

Author(s):

B. S. Thomson

Keyword(s):

Exact Solution ◽

Orlicz Spaces ◽

Covering Property ◽

Intimate Connection ◽

Differentiation Theory ◽

Covering Properties ◽

Necessary And Sufficient

There are now a number of Vitali covering properties which have been defined to handle problems arising in differentiation theory. Although some of these have received a unified treatment, as for example in the setting of Orlicz spaces in [1, p. 168], the underlying simplicity can be lost and the intimate connection with the original weak Vitali covering property of de Possel obscured. In this note we present an exposition of a family of covering properties and show how the original methods of de Possel in [4] can be pushed to provide an exact solution of the problem of determining necessary and sufficient covering properties for a basis which is known to differentiate a given class of integrals.

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De-differentiation in thyroid cancer- an increasingly appreciated concept

International Surgery Journal ◽

10.18203/2349-2902.isj20210400 ◽

2021 ◽

Vol 8 (2) ◽

pp. 757

Author(s):

Prasanth Poolakkil ◽

Sajith Babu Thavarool ◽

Satheesan Balasubramanyam ◽

Kandathil Joseph Philip

Keyword(s):

Thyroid Cancer ◽

Targeted Therapy ◽

Rare Case ◽

Treatment Strategies ◽

Good Prognosis ◽

Genetic Changes ◽

Molecular Changes ◽

Clinical Behaviour ◽

Differentiation Theory ◽

Differentiation Pattern

Thyroid cancer is the most common endocrine malignancy. In general, they are said to be of good prognosis, still there are a few aggressive variants. Differentiated carcinomas like papillary and follicular comprise of major proportion and have a less aggressive clinical behaviour, even though some of them tend to be otherwise. De-differentiated and undifferentiated cancers are more aggressive. There has been an already existing theory that these de-differentiated cancers arise from differentiated ones by a process of stepwise molecular changes. There are already reported cases of coexistence of multiple histologies. Appreciation of dedifferentiation and identification of the genetic changes may be of help in forming improved treatment strategies, including targeted therapy. This article is to report a rare case we came across, in which three different histologies coexisted and may be pointing towards graded de-differentiation pattern. This is a further support to the stepwise de-differentiation theory.

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Paths to Modernity and the Secularization Issue

Analyse & Kritik ◽

10.1515/auk-2017-0019 ◽

2017 ◽

Vol 39 (2) ◽

Author(s):

Thomas Schwinn

Keyword(s):

Max Weber ◽

Sociology Of Religion ◽

Differentiation Theory ◽

Long Time ◽

The Usa ◽

Lively Debate ◽

High Level

AbstractIn the lively debate of the last two decades about the validity of the ‘secularization thesis’, the comparison between Europe and the USA plays a central role. The high level of religiosity beyond the Atlantic has put under pressure the assumption of the loss of importance of religion in modernity, which had been prevalent for a long time. In this debate, the connection between the differentiation theory and sociology of religion, which has already been discussed by the classics of the discipline, has attracted too little attention. This article takes up this desideratum and proposes, following Max Weber, a theory of differentiation which is able to cover the variety of religious processes. This proposed analysis will be made concrete with reference to the different paths to modernity of Europe and the USA and the related importance of religion.

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