scholarly journals Anomalous transfer effects after shape discrimination training in the rat

1965 ◽  
Vol 3 (1-12) ◽  
pp. 97-98 ◽  
Author(s):  
P. C. Dodwell
Keyword(s):  
Discrimination Training ◽  
Shape Discrimination ◽  
Transfer Effects

Effects of Shape-Discrimination Training on the Selectivity of Inferotemporal Cells in Adult Monkeys

1998 ◽  
Vol 80 (1) ◽  
pp. 324-330 ◽  
Author(s):  
Eucaly Kobatake ◽  
Gang Wang ◽  
Keiji Tanaka
Keyword(s):  
Discrimination Training ◽  
Neural Mechanisms ◽  
Visual Object ◽  
Shape Discrimination ◽  
Discrimination Ability ◽  
Cell Responses ◽  
Extensive Training ◽  
Complex Shapes ◽  
Visual Cortical ◽  
Area Te

Kobatake, Eucaly, Gang Wang, and Keiji Tanaka. Effects of shape-discrimination training on the selectivity of inferotemporal cells in adult monkeys. J. Neurophysiol. 80: 324–330, 1998. Through extensive training, humans can become “visual experts,” able to visually distinguish subtle differences among similar objects with greater ease than those who are untrained. To understand the neural mechanisms behind this acquired discrimination ability, adult monkeys were fully trained to discriminate 28 moderately complex shapes. The training effects on the stimulus selectivity of cells in area TE of the inferotemporal cortex were then examined in anesthetized preparations. Area TE represents a later stage of the ventral visual cortical pathway that is known to mediate visual object discrimination and recognition. The recordings from the trained monkeys and untrained controls showed that the proportion of TE cells responsive to some member of the 28 stimuli was significantly greater in the trained monkeys than that in the control monkeys. Cell responses recorded from the trained monkeys were not sharply tuned to single training stimuli, but rather broadly covered several training stimuli. The distances among the training stimuli in the response space spanned by responses of the recorded TE cells were significantly greater in the trained monkeys than those in the control monkeys. The subset of training stimuli to which individual cells responded differed from cell to cell with only partial overlaps, suggesting that the cells responded to features common to several stimuli. These results are consistent with a model in which visual expertise is acquired through the development of differential responses by inferotemporal cells to the images of relevant objects.

An Experiment on Shape Discrimination and Signal Detection in Octopus

1970 ◽  
Vol 22 (2) ◽  
pp. 82-90 ◽  
Author(s):  
W. R. A. Muntz
Keyword(s):  
Signal Detection ◽  
Discrimination Training ◽  
Roc Curve ◽  
Signal Detection Theory ◽  
Successive Discrimination ◽  
General Level ◽  
Original Training ◽  
Shape Discrimination ◽  
A Value ◽  
Vertical Bars

Ten octopuses were trained to perform a successive discrimination between the two shapes shown in Figure I (a). After 7 days of training, when performance was significantly above chance, transfer tests were given with other shapes that were either rotations or parts of the original training shapes. At least six theories have been put forward to explain shape discrimination in the octopus, but none of these are capable of explaining the present results. The transfer tests suggest that the discrimination was performed in terms of component parts of the shapes (vertical bars projecting upwards or downwards), and their relationship to the shape as a whole (terminal or central). During successive discrimination training the general level of attack varies between animals, and fluctuates from day to day. As a result there are often more attacks on both the positive and negative shapes on some occasions than others, making it difficult to compare the levels of discrimination achieved. It is suggested that the concepts of signal detection theory can help overcome this difficulty. Attacks on the positive shape (“hits”) plotted against attacks on the negative shape (“false positives”) constitute an ROC curve from which a value of d′, independant of the general level of attack, can be obtained.

Nonspecific transfer effects of discrimination training in the rat.

1971 ◽  
Vol 74 (1, Pt.1) ◽  
pp. 96-101 ◽  
Author(s):  
David R. Thomas ◽  
James T. Miller ◽  
John G. Svinicki
Keyword(s):  
Discrimination Training ◽  
Transfer Effects

Solar Flare Energetic Neutral Emission Measurements in the Project Coronas-I

1994 ◽  
Vol 144 ◽  
pp. 635-639
Author(s):  
J. Baláž ◽  
A. V. Dmitriev ◽  
M. A. Kovalevskaya ◽  
K. Kudela ◽  
S. N. Kuznetsov ◽  
...  
Keyword(s):  
Solar Flare ◽  
Energy Range ◽  
Gamma Rays ◽  
Pulse Shape ◽  
Gamma Ray ◽  
Pulse Shape Discrimination ◽  
Shape Discrimination ◽  
Solar Neutron ◽  
Low Altitude

AbstractThe experiment SONG (SOlar Neutron and Gamma rays) for the low altitude satellite CORONAS-I is described. The instrument is capable to provide gamma-ray line and continuum detection in the energy range 0.1 – 100 MeV as well as detection of neutrons with energies above 30 MeV. As a by-product, the electrons in the range 11 – 108 MeV will be measured too. The pulse shape discrimination technique (PSD) is used.

Secondary Transfer Effect of Contact

2009 ◽  
Vol 40 (2) ◽  
pp. 55-65 ◽  
Author(s):  
Thomas F. Pettigrew
Keyword(s):  
Cognitive Dissonance ◽  
Experimental Research ◽  
Intergroup Contact ◽  
Transfer Effect ◽  
Evaluative Conditioning ◽  
Transfer Effects ◽  
Secondary Transfer ◽  
Primary Reduction

This paper reviews the evidence for a secondary transfer effect of intergroup contact. Following a contact’s typical primary reduction in prejudice toward the outgroup involved in the contact, this effect involves a further, secondary reduction in prejudice toward noninvolved outgroups. Employing longitudinal German probability samples, we found that significant secondary transfer effects of intergroup contact exist, but they were limited to specific outgroups that are similar to the contacted outgroup in perceived stereotypes, status or stigma. Since the contact-prejudice link is bidirectional, the effect is inflated when prior prejudice reducing contact is not controlled. The strongest evidence derives from experimental research. Both cognitive (dissonance) and affective (evaluative conditioning) explanations for the effect are offered.

Pattern of Near Transfer Effects Following Working Memory Training With a Dual N-Back Task

2017 ◽  
Vol 64 (4) ◽  
pp. 240-252 ◽  
Author(s):  
Anna Soveri ◽  
Eric P. A. Karlsson ◽  
Otto Waris ◽  
Petra Grönholm-Nyman ◽  
Matti Laine
Keyword(s):  
Working Memory ◽  
Controlled Trial ◽  
Composite Score ◽  
Memory Training ◽  
Interference Control ◽  
Transfer Effects ◽  
Near Transfer ◽  
Randomized Controlled ◽  
Transfer Tasks ◽  
Back Task

Abstract. In a randomized controlled trial, we investigated the pattern of near transfer effects of working memory (WM) training with an adaptive auditory-visuospatial dual n-back training task in healthy young adults. The results revealed significant task-specific transfer to an untrained single n-back task, and more general near transfer to a WM updating composite score plus a nearly significant effect on a composite score measuring interference control in WM. No transfer effects were seen on Active or Passive WM composites. The results are discussed in the light of cognitive versus strategy-related overlap between training and transfer tasks.

Sign in / Sign up

Export Citation Format

Share Document