Relationship of component cues to hypotheses in conjunctive concept learning.

1970 ◽  
Vol 83 (2, Pt.1) ◽  
pp. 351-353 ◽  
Author(s):  
Irwin D. Nahinsky ◽  
William C. Penrod ◽  
Frank L. Slaymaker
Keyword(s):  
Concept Learning ◽  
Conjunctive Concept ◽  
Relationship Of

An Extension of Four Single-Cue Process Models to Conjunctive Concept Learning

1970 ◽  
Vol 26 (1) ◽  
pp. 95-102 ◽  
Author(s):  
Kenneth A. Deffenbacher
Keyword(s):  
Concept Learning ◽  
Process Models ◽  
Stimulus Complexity ◽  
Lack Of Fit ◽  
Conjunctive Concept ◽  
Wide Range

A family of 4 different process models of single-cue concept learning was extended to 2-category conjunctive concept learning. The fit of these 4 extended models to data from 120 Ss solving conjunctive problems over a wide range of stimulus complexity was assessed. None of the models did a thoroughly satisfactory job of fitting the data over all levels of stimulus complexity. Possible reasons for this lack of fit were discussed.

Relationship of intelligence and mediating processes to concept learning.

1969 ◽  
Vol 60 (2) ◽  
pp. 109-112 ◽  
Author(s):  
Leonard I. Jacobson ◽  
Thomas C. Dickinson ◽  
Joyce M. Fleishman ◽  
Rosemary S. Haraguchi
Keyword(s):  
Concept Learning ◽  
Relationship Of

scholarly journals Spatial Concept Learning: A Spiking Neural Network Implementation in Virtual and Physical Robots

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
André Cyr ◽  
Frédéric Thériault
Keyword(s):  
Neural Network ◽  
Operant Conditioning ◽  
Concept Learning ◽  
Specific Pattern ◽  
Spiking Neural Network ◽  
Conditioning Procedure ◽  
Spatial Concept ◽  
Rule Changes ◽  
Relationship Of ◽  
The Relationship

This paper proposes an artificial spiking neural network (SNN) sustaining the cognitive abstract process of spatial concept learning, embedded in virtual and real robots. Based on an operant conditioning procedure, the robots learn the relationship of horizontal/vertical and left/right visual stimuli, regardless of their specific pattern composition or their location on the images. Tests with novel patterns and locations were successfully completed after the acquisition learning phase. Results show that the SNN can adapt its behavior in real time when the rewarding rule changes.

Strategy Development as a Function of the Amount of Relevant or Irrelevant Information

1989 ◽  
Vol 65 (3) ◽  
pp. 787-791
Author(s):  
Rita R. Culross ◽  
J. Kent Davis
Keyword(s):  
Concept Learning ◽  
Relevant Information ◽  
Irrelevant Information ◽  
Learning Problems ◽  
Strategy Development ◽  
Amount Of Information ◽  
Conjunctive Concept ◽  
The Relationship ◽  
Over Time

The study examined the relationship between the amount of relevant or irrelevant information and subjects' strategies. Subjects solved 16 conjunctive concept-learning problems which varied in terms of the amount and type of information. The study measured the focusing strategy, the number of choices to solution, and the time to solution. Analysis indicated focusing scores were highest when the amount of information was lowest and relevant information was the source of the information. Other results suggest strategies developed over time.

The relationship of the scleractinian corals to the rugose corals

Paleobiology ◽  
1980 ◽  
Vol 6 (02) ◽  
pp. 146-160 ◽  
Author(s):  
William A. Oliver
Keyword(s):  
Critical Points ◽  
Scleractinian Corals ◽  
Convincing Evidence ◽  
Early Triassic ◽  
Rugose Corals ◽  
History Of ◽  
The Subject ◽  
Relationship Of ◽  
The Relationship ◽  
Biologic Factors

The Mesozoic-Cenozoic coral Order Scleractinia has been suggested to have originated or evolved (1) by direct descent from the Paleozoic Order Rugosa or (2) by the development of a skeleton in members of one of the anemone groups that probably have existed throughout Phanerozoic time. In spite of much work on the subject, advocates of the direct descent hypothesis have failed to find convincing evidence of this relationship. Critical points are:(1) Rugosan septal insertion is serial; Scleractinian insertion is cyclic; no intermediate stages have been demonstrated. Apparent intermediates are Scleractinia having bilateral cyclic insertion or teratological Rugosa.(2) There is convincing evidence that the skeletons of many Rugosa were calcitic and none are known to be or to have been aragonitic. In contrast, the skeletons of all living Scleractinia are aragonitic and there is evidence that fossil Scleractinia were aragonitic also. The mineralogic difference is almost certainly due to intrinsic biologic factors.(3) No early Triassic corals of either group are known. This fact is not compelling (by itself) but is important in connection with points 1 and 2, because, given direct descent, both changes took place during this only stage in the history of the two groups in which there are no known corals.

Skeletal elements of crinoid echinoderms: High-resolution structural and microanalytical results

1983 ◽  
Vol 41 ◽  
pp. 194-195
Author(s):  
D. F. Blake ◽  
L. F. Allard ◽  
D. R. Peacor
Keyword(s):  
High Resolution ◽  
Marine Invertebrates ◽  
Sea Urchins ◽  
Structural Features ◽  
Sea Stars ◽  
High Resolution Tem ◽  
Relationship Of ◽  
The Relationship ◽  
Insight Into

Echinodermata is a phylum of marine invertebrates which has been extant since Cambrian time (c.a. 500 m.y. before the present). Modern examples of echinoderms include sea urchins, sea stars, and sea lilies (crinoids). The endoskeletons of echinoderms are composed of plates or ossicles (Fig. 1) which are with few exceptions, porous, single crystals of high-magnesian calcite. Despite their single crystal nature, fracture surfaces do not exhibit the near-perfect {10.4} cleavage characteristic of inorganic calcite. This paradoxical mix of biogenic and inorganic features has prompted much recent work on echinoderm skeletal crystallography. Furthermore, fossil echinoderm hard parts comprise a volumetrically significant portion of some marine limestones sequences. The ultrastructural and microchemical characterization of modern skeletal material should lend insight into: 1). The nature of the biogenic processes involved, for example, the relationship of Mg heterogeneity to morphological and structural features in modern echinoderm material, and 2). The nature of the diagenetic changes undergone by their ancient, fossilized counterparts. In this study, high resolution TEM (HRTEM), high voltage TEM (HVTEM), and STEM microanalysis are used to characterize tha ultrastructural and microchemical composition of skeletal elements of the modern crinoid Neocrinus blakei.

Studies on Leukemogenic and Sarcomagenic Viruses

1970 ◽  
Vol 28 ◽  
pp. 156-157
Author(s):  
Leon Dmochowski
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Morphological Properties ◽  
Mode Of Development ◽  
Relationship Of ◽  
The Relationship

Electron microscopy has proved to be an invaluable discipline in studies on the relationship of viruses to the origin of leukemia, sarcoma, and other types of tumors in animals and man. The successful cell-free transmission of leukemia and sarcoma in mice, rats, hamsters, and cats, interpreted as due to a virus or viruses, was proved to be due to a virus on the basis of electron microscope studies. These studies demonstrated that all the types of neoplasia in animals of the species examined are produced by a virus of certain characteristic morphological properties similar, if not identical, in the mode of development in all types of neoplasia in animals, as shown in Fig. 1.

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