scholarly journals Western scrub-jays do not appear to attend to functionality in Aesop’s Fable experiments

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e1707 ◽  
Author(s):  
Corina J. Logan ◽  
Brigit D. Harvey ◽  
Barney A. Schlinger ◽  
Michelle Rensel
Keyword(s):  
Cognitive Abilities ◽  
Food Reward ◽  
The Other ◽  
Functional Differences ◽  
Food Storing

Western scrub-jays are known for their highly discriminatory and flexible behaviors in a caching (food storing) context. However, it is unknown whether their cognitive abilities are restricted to a caching context. To explore this question, we tested scrub-jays in a non-caching context using the Aesop’s Fable paradigm, where a partially filled tube of water contains a floating food reward and objects must be inserted to displace the water and bring the food within reach. We tested four birds, but only two learned to drop stones proficiently. Of these, one bird participated in 4/5 experiments and one in 2/5 experiments. Both birds passed one experiment, but without attending to the functional differences of the objects, and failed the other experiments. Scrub-jays were not motivated to participate in these experiments, suggesting that either this paradigm was ecologically irrelevant or perhaps their flexibility is restricted to a caching context.

scholarly journals Western scrub-jays do not appear to attend to functionality in Aesop’s Fable experiments

2015 ◽  
Author(s):  
Corina J Logan ◽  
Brigit D Harvey ◽  
Barney A Schlinger ◽  
Michelle Rensel
Keyword(s):  
Functional Properties ◽  
Cognitive Abilities ◽  
Food Reward ◽  
Food Storing

Western scrub-jays are known for their highly discriminatory and flexible behaviors in a caching (food storing) context. However, it is unknown whether their cognitive abilities are restricted to a caching context. To explore this question, we tested scrub-jays in a non-caching context using the Aesop’s Fable paradigm, where a partially filled tube of water contains a floating food reward and objects must be inserted to displace the water and bring the food within reach. We found that scrub-jays did not attend to the functional properties of objects or tubes, and were not motivated to participate in these experiments, suggesting that either this paradigm was ecologically irrelevant or perhaps their flexibility is restricted to a caching context.

scholarly journals Western scrub-jays do not appear to attend to functionality in Aesop’s Fable experiments

2015 ◽  
Author(s):  
Corina J Logan ◽  
Brigit D Harvey ◽  
Barney A Schlinger ◽  
Michelle Rensel
Keyword(s):  
Functional Properties ◽  
Cognitive Abilities ◽  
Food Reward ◽  
Food Storing

Western scrub-jays are known for their highly discriminatory and flexible behaviors in a caching (food storing) context. However, it is unknown whether their cognitive abilities are restricted to a caching context. To explore this question, we tested scrub-jays in a non-caching context using the Aesop’s Fable paradigm, where a partially filled tube of water contains a floating food reward and objects must be inserted to displace the water and bring the food within reach. We found that scrub-jays did not attend to the functional properties of objects or tubes, and were not motivated to participate in these experiments, suggesting that either this paradigm was ecologically irrelevant or perhaps their flexibility is restricted to a caching context.

Effects of Large and Small Bilateral Hippocampal Lesions on Two Types of Passive-Avoidance Responses

1965 ◽  
Vol 16 (3_suppl) ◽  
pp. 1277-1290 ◽  
Author(s):  
Daniel R. Snyder ◽  
Robert L. Isaacson
Keyword(s):  
Passive Avoidance ◽  
Food Reward ◽  
Dorsal Hippocampus ◽  
Passive Avoidance Task ◽  
The Other ◽  
Hippocampal Damage ◽  
Avoidance Task ◽  
Small Compartment ◽  
Hippocampal Lesions ◽  
Avoidance Responses

Ten rats with large bilateral hippocampectomies, 10 rats with smaller amounts of damage of the dorsal hippocampus, 10 rats with destruction of postero-lateral neocortex, and 15 normal animals were trained in two types of passive-avoidance situations. One passive-avoidance task required inhibition of drinking while thirsty, the other required an animal to refrain from entering a small compartment after i: had been trained to enter, while hungry, for a food reward. Animals with the largest amounts of hippocampal destruction were impaired in both types of problems. Animals with smaller degrees of hippocampal damage were not different from normal animals in their ability to inhibit licking but were impaired in the other task. Animals with neocortical destruction showed impairment only in the licking situation.

Differential expression of cell-cell and cell-substratum adhesion proteins along the kidney nephron

1995 ◽  
Vol 269 (6) ◽  
pp. C1433-C1449 ◽  
Author(s):  
P. A. Piepenhagen ◽  
W. J. Nelson
Keyword(s):  
Cell Adhesion ◽  
Immunofluorescence Microscopy ◽  
The Other ◽  
Beta Catenin ◽  
Desmosomal Cadherins ◽  
Functional Differences ◽  
Associated Proteins ◽  
Capillary Endothelial Cells ◽  
Mediate Cell ◽  
Cell Cell

Structural and functional differences among epithelial cells of kidney nephrons may be regulated by variations in cell-to-cell (cell-cell) and cell-to-substratum (cell-substratum) junctions. Using immunofluorescence microscopy, we demonstrate that the cadherin-associated proteins alpha- and beta-catenin are localized to basolateral membranes of cells in all nephron segments, whereas plakoglobin, a protein associated with both classical and desmosomal cadherins, is localized to noninterdigitated lateral membranes in the distal half of the nephron where it colocalizes with desmoplakin and cytokeratin K8. Plakoglobin is also present in capillary endothelial cells where staining for the other catenins and desmosomal proteins is not observed. Immunofluorescence for laminin A and alpha 6-integrin, proteins that mediate cell-substratum contacts, reveal no correlations with the other staining patterns observed. These data indicate that plakoglobin and beta-catenin subserve distinct functions in cell-cell adhesion and suggest that E-cadherin-mediated contacts generate a basal level of cell-cell adhesion, whereas desmosomal junctions provide additional strength to cell-cell contacts in the distal nephron.

Arbitration from a Law & Economics Perspective

2020 ◽  
pp. 873-894
Author(s):  
Anne van Aaken ◽  
Tomer Broude
Keyword(s):  
Dispute Resolution ◽  
Cognitive Abilities ◽  
Supply And Demand ◽  
The Other ◽  
Third Party ◽  
International Arbitration ◽  
General Welfare ◽  
Welfare Consequences ◽  
Party Funding

This chapter offers a Law & Economics (L&E) perspective on international arbitration. L&E scholars tend to view dispute resolution as a market. They thus look at the supply and demand of such third-party adjudication, usually comparing litigation to arbitration. Predominantly, in the literature, there are two interrelated L&E perspectives on this: one is focused on the general welfare consequences of arbitration; the other is focused on why disputants choose one kind of third-party settlement over another. There are many ways of resolving disputes between contractual parties: arbitration is also in competition with mediation, conciliation, litigation, and other forms of resolving disputes, including so-called ‘extra-legal’, socially normative ones. Most literature has focused either on the choice between litigation and arbitration or on the influence of arbitration on negotiation and settlement between the parties. The chapter then addresses other disputant choices relating to third-party funding and arbitrator appointment. It also looks at the incentives and behaviour of arbitrators, including their cognitive abilities.

scholarly journals Decisions on driving after brain injury/disease: Feasibility and construct validity of a new simulator assessment tool

2020 ◽  
pp. 030802262095098
Author(s):  
Kersti Samuelsson ◽  
Ewa Wressle
Keyword(s):  
Brain Injury ◽  
Construct Validity ◽  
Cognitive Abilities ◽  
Driving Simulator ◽  
Assessment Tool ◽  
Clinical Decision ◽  
The Other ◽  
Complex Activity ◽  
Significant Difference ◽  
High Level

Introduction Driving is a complex activity involving a high level of cognitive abilities and thus might be affected after a brain injury/disease. The aim of this research was to evaluate the feasibility and construct validity of a driving simulator tool as a complement to existing driving assessments of patients with cognitive dysfunctions after a brain injury/disease. Method A descriptive and prospective research design was achieved. For construct validation, decisions were based on results from the Useful Field of View, Nordic Stroke Driver Screening Assessment, Trail Making Test and, when necessary for the decision, an on-road observation. Results from the simulator tool were not included in the clinical decision process. Results A total of 129 patients from four different rehabilitation services were included. The results showed a significant difference in test results between those who were considered medically fit versus unfit to drive. A factor analysis revealed four components, all including attention in combination with processing speed, visuospatial function, simultaneous capacity and executive function; these are all represented in the simulator tool. A correlation analysis showed that simulator subtest 3 (response/divergent response to stimuli) had the strongest correlation with most of the other tests included. Conclusions The simulator was found to be feasible and valid and found to include components other than those measured in the other tests.

Problem solving capabilities of peach-fronted conures (Eupsittula aurea) studied with the string-pulling test

Behaviour ◽  
2019 ◽  
Vol 156 (5-8) ◽  
pp. 815-846
Author(s):  
Sara Torres Ortiz ◽  
Alyssa Maxwell ◽  
Anastasia Krasheninnikova ◽  
Magnus Wahlberg ◽  
Ole Næsbye Larsen
Keyword(s):  
Problem Solving ◽  
Cognitive Abilities ◽  
Food Reward ◽  
String Pulling ◽  
Goal Directedness

Abstract The problem-solving capabilities of four small parrots (peach-fronted conures, Eupsittula aurea) were investigated using string-pulling tests. In seven different tasks, one string was baited following a randomized order. The parrots could retrieve the food reward after a wrong choice as the choice was not forced. Additionally, we applied a non-intuitive pulley task with the strings arranged in front of, instead of below the birds. All four parrots performed very well in the multiple, slanted, and broken string tasks, but all failed in the crossed-string task. Only two parrots solved the single pulley task. All four parrots performed successfully in the multiple pulley task but all failed in the broken pulley condition. Our results suggest that peach-fronted conures solve string-pulling tasks without relying on simple proximity based rules, but that they have evolved cognitive abilities enabling goal-directedness, the understanding of functionality, and a concept of connectedness between two objects.

Light-adaptation properties of the ultraviolet-sensitive cone mechanism in comparison to the other receptor mechanisms of goldfish

1991 ◽  
Vol 6 (4) ◽  
pp. 293-301 ◽  
Author(s):  
Craig W. Hawryshyn
Keyword(s):  
Heart Rate ◽  
Light Adaptation ◽  
Weber Fraction ◽  
Luminance Contrast ◽  
The Other ◽  
Brightness Contrast ◽  
Background Intensity ◽  
Contrast Threshold ◽  
Functional Differences ◽  
Threshold Technique

AbstractThe light-adaptation properties of goldfish photoreceptor mechanisms were examined using Stiles' two-color threshold technique. Threshold vs. background intensity (TVI) curves were determined for isolated cone and rod mechanisms using the heart-rate conditioning technique. The principal aim of this study was to compare the light-adaptation properties of the ultraviolet (UV)-sensitive cone mechanism to the other receptor mechanisms of goldfish. This examination revealed several striking functional differences: (1) The UV-sensitive cone mechanism threshold vs. background intensity (TVI) exhibited a slope of 0.65 (compared to the approximate 1.0 for the other cone mechanisms on a log/log plot) and thus was not in accordance with Weber's law. This may in part be related to the intrusion of the blue-sensitive mechanism at the upper radiance range. (2) The operation of the UV-sensitive cone mechanism was limited to intermediate intensities (i.e. not very dim or bright). (3) The UV-sensitive cone mechanism exhibited a Weber fraction or luminance contrast threshold of 0.316 that was approximately six times larger than the other cone mechanisms but comparable to the rod mechanism. This indicates that the UV-sensitive cone mechanism performs relatively poorly in terms of brightness contrast detection.

scholarly journals El Pensamiento computacional: ¿Una nueva forma de entrenar la memoria de trabajo?

2020 ◽  
Vol 20 (63) ◽  
Author(s):  
Eduardo Sanabria Zafra ◽  
Noelia Rodríguez Rodríguez ◽  
Andrés Eduardo Zerpa Pérez ◽  
Pedro Prieto Marañón ◽  
María Ángeles Alonso Rodríguez
Keyword(s):  
Working Memory ◽  
Cognitive Abilities ◽  
Computational Thinking ◽  
The Other ◽  
High Level ◽  
The University

El pensamiento computacional es un concepto reciente que ha cobrado importancia en los últimos años. Se ha encontrado que entrenamientos basados en este concepto, son capaces de producir mejoras en diversas funciones cognitivas. En este trabajo se ha empleado un entrenamiento basado en el pensamiento computacional elaborado por el Aula Cultural de Pensamiento Computacional y la Fundación general de la Universidad de La Laguna. El entrenamiento se aplicó a alumnos de secundaria divididos en dos grupos: un grupo que se basaba en una metodología de aprendizaje guiada y otro basado en una metodología de aprendizaje por descubrimiento. El objetivo es comprobar si el entrenamiento es capaz de producir mejoras en las medidas de memoria de trabajo y si es más beneficioso para los participantes con un nivel de memoria de trabajo alto. Los resultados obtenidos muestran que el entrenamiento, independientemente de la metodología que se aplique es capaz de producir mejoras en las diferentes medidas de memoria trabajo. Así mismo, no se encontró evidencia de que los participantes con un nivel de memoria de trabajo alto se beneficien más del entrenamiento en la mayoría de las pruebas, pero si se encontró un beneficio mayor de estos en la prueba de figuras abstractas. Computational thinking is a new concept wich has been adquiring relevance in the last few years. There are some evidence of trainings based on this new concept improving different cognitive abilities. In this paper, it has been used a training based on computational thinking, designed by “aula cultural de pensamiento computacional” and the general fundation of the University of La Laguna. This training was applied to students of secondary obligatory education who had been divided into two grups: one group recives the training with a methodology based in guide learning and the other group recived the training based on autolearning methodology. The main objective of this paper is to prove that training can improve the measures of working memory and check if the participants who have a high level of working memory take more benefits of the training. The results show that the training based on computational thinking improved the measures of working memory. In addition, there was no evidence of a higher level of benefit of the training in most of the taskes in the participants who have a high working memory level.

scholarly journals The interplay of cognition and cooperation

2010 ◽  
Vol 365 (1553) ◽  
pp. 2699-2710 ◽  
Author(s):  
Sarah F. Brosnan ◽  
Lucie Salwiczek ◽  
Redouan Bshary
Keyword(s):  
Cognitive Abilities ◽  
Cognitive Complexity ◽  
Convincing Evidence ◽  
The Other ◽  
Evolution Of Cooperation ◽  
Social Environments ◽  
Average Gain ◽  
Central Nervous Systems ◽  
Tit For Tat ◽  
Key Variables

Cooperation often involves behaviours that reduce immediate payoffs for actors. Delayed benefits have often been argued to pose problems for the evolution of cooperation because learning such contingencies may be difficult as partners may cheat in return. Therefore, the ability to achieve stable cooperation has often been linked to a species' cognitive abilities, which is in turn linked to the evolution of increasingly complex central nervous systems. However, in their famous 1981 paper, Axelrod and Hamilton stated that in principle even bacteria could play a tit-for-tat strategy in an iterated Prisoner's Dilemma. While to our knowledge this has not been documented, interspecific mutualisms are present in bacteria, plants and fungi. Moreover, many species which have evolved large brains in complex social environments lack convincing evidence in favour of reciprocity. What conditions must be fulfilled so that organisms with little to no brainpower, including plants and single-celled organisms, can, on average, gain benefits from interactions with partner species? On the other hand, what conditions favour the evolution of large brains and flexible behaviour, which includes the use of misinformation and so on? These questions are critical, as they begin to address why cognitive complexity would emerge when ‘simple’ cooperation is clearly sufficient in some cases. This paper spans the literature from bacteria to humans in our search for the key variables that link cooperation and deception to cognition.

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