In mixed company: two macaws are self-regarding in a symbolic prosocial choice task

2022 ◽  
Vol 76 (1) ◽  
Author(s):  
Jessica Ann Leete ◽  
Jennifer Vonk
Keyword(s):  
2019 ◽  
Vol 62 (5) ◽  
pp. 1243-1257 ◽  
Author(s):  
Peggy Pik Ki Mok ◽  
Holly Sze Ho Fung ◽  
Vivian Guo Li

Purpose Previous studies showed early production precedes late perception in Cantonese tone acquisition, contrary to the general principle that perception precedes production in child language. How tone production and perception are linked in 1st language acquisition remains largely unknown. Our study revisited the acquisition of tone in Cantonese-speaking children, exploring the possible link between production and perception in 1st language acquisition. Method One hundred eleven Cantonese-speaking children aged between 2;0 and 6;0 (years;months) and 10 adolescent reference speakers participated in tone production and perception experiments. Production materials with 30 monosyllabic words were transcribed in filtered and unfiltered conditions by 2 native judges. Perception accuracy was based on a 2-alternative forced-choice task with pictures covering all possible tone pair contrasts. Results Children's accuracy of production and perception of all the 6 Cantonese tones was still not adultlike by age 6;0. Both production and perception accuracies matured with age. A weak positive link was found between the 2 accuracies. Mother's native language contributed to children's production accuracy. Conclusions Our findings show that production and perception abilities are associated in tone acquisition. Further study is needed to explore factors affecting production accuracy in children. Supplemental Material https://doi.org/10.23641/asha.7960826


2001 ◽  
Author(s):  
Markus Dressel ◽  
Teena D. Moody ◽  
Barbara J. Knowlton

2012 ◽  
Author(s):  
Tiffany Galtress ◽  
Aaron Smith ◽  
Kimberly Kirkpatrick

2019 ◽  
Author(s):  
Joseph John Pyne Simons ◽  
Ilya Farber

Not all transit users have the same preferences when making route decisions. Understanding the factors driving this heterogeneity enables better tailoring of policies, interventions, and messaging. However, existing methods for assessing these factors require extensive data collection. Here we present an alternative approach - an easily-administered single item measure of overall preference for speed versus comfort. Scores on the self-report item predict decisions in a choice task and account for a proportion of the differences in model parameters between people (n=298). This single item can easily be included on existing travel surveys, and provides an efficient method to both anticipate the choices of users and gain more general insight into their preferences.


2021 ◽  
Vol 32 (2) ◽  
pp. 292-300
Author(s):  
Stephen Ferrigno ◽  
Yiyun Huang ◽  
Jessica F. Cantlon

The capacity for logical inference is a critical aspect of human learning, reasoning, and decision-making. One important logical inference is the disjunctive syllogism: given A or B, if not A, then B. Although the explicit formation of this logic requires symbolic thought, previous work has shown that nonhuman animals are capable of reasoning by exclusion, one aspect of the disjunctive syllogism (e.g., not A = avoid empty). However, it is unknown whether nonhuman animals are capable of the deductive aspects of a disjunctive syllogism (the dependent relation between A and B and the inference that “if not A, then B” must be true). Here, we used a food-choice task to test whether monkeys can reason through an entire disjunctive syllogism. Our results show that monkeys do have this capacity. Therefore, the capacity is not unique to humans and does not require language.


2021 ◽  
pp. 025609092110154
Author(s):  
Sundar Balakrishna ◽  
Vineet Virmani

Executive Summary This study presents evidence on time discount rate of forest-dependent communities (FDCs) in the backdrop of the joint forest management program launched by the Government of India in 1990. The study uses data from two regions of the Indian state of Andhra Pradesh—Rayalaseema (a relatively dry forest region with low income) and the coastal region (relatively fertile forest and with higher income). We also identify socio-economic determinants of their patience levels and factors which distinguish the two regions. To elicit individual discount rates of FDCs members and their determinants, we use the choice task design methodology. Members from both regions were found to be highly impatient using the standard choice task design with the revealed time discount rate averaging 800% per annum. Members of FDCs from Rayalaseema were more impatient than their counterparts from the coastal region, although the statistical evidence is weak. We find no association between the income of members of FDCs and their time discount rate for both regions. Membership to caste categories showed a different response in both the regions, with members from the Scheduled Caste category and Other Backward Classes found to have a lower discount rate than those from the Scheduled Tribes category of Rayalaseema region and vice versa for the coastal region. For the coastal region, those with larger family size and heads of households were found to have a lower discount rate.


2020 ◽  
Vol 9 (2) ◽  
pp. 169-198
Author(s):  
Chen Chen ◽  
Feng-hsi Liu

Abstract A major claim in the constructionist approach to language acquisition is that grammar is learned by pairings of form and function. In this study we test this claim by examining how L2 learners of Mandarin Chinese acquire the bei passive construction, a construction that is associated with the meaning of adversity. Our goal is to find out whether L2 learners make the association between the passive and adversity. Participants performed a sentence choice task under four conditions: an adversative context with an adversative verb, an adversative context with a neutral verb, a neutral context with a neutral verb and a positive context with a neutral verb. In each context participants were asked to select either the bei passive construction or its active counterpart. We found that high-level learners consistently chose the bei passive significantly more in adversative contexts than in non-adversative contexts regardless of the connotations of the verbs, while low-level learners made the distinction half of the time. In addition, while low-level learners did not yet associate adversity with the form of the construction, high-level learners did. We conclude that L2 learners do learn the bei passive construction as a form-meaning pair. The constructionist approach is supported.


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