Pygmy Marmoset Exudate Feeding Stimulates Exudate Production

2021 ◽  
pp. 1-8
Author(s):  
Colin P. Jackson ◽  
Ulrich H. Reichard
Keyword(s):  
Random Effect ◽  
Renewable Resource ◽  
Treatment Conditions ◽  
Fungal Load ◽  
Pygmy Marmosets ◽  
Cumulative Production ◽  
Within Subjects ◽  
Exudate Feeding ◽  
Mixed Modelling

Exudates are an important renewable resource for many primates. Exudate renewability is based on observations of primates repeatedly depleting exudate sites and measures of exudate trees’ daily replenishment rates, but the role of the consumer in the renewal process is unclear. Trees’ exudate production may be independent of the consumer, remaining unchanged regardless of depletion frequency, but since trees produce exudates as a physiological response to fungal infection, they may produce more exudates with more frequent depletion. To test these competing hypotheses, we employed a within-subjects experimental design in which we exposed pygmy marmosets’ exudate holes to two treatment conditions: collecting exudates after 5 h and collecting exudates every hour for five consecutive hours. To compare production outputs between treatments, we used generalised linear mixed modelling in which log-transformed production data were a function of treatment with exudate holes nested within trees as a random effect. The model indicated that the cumulative production of hourly exudate removal was significantly greater than the amount accumulated after 5 h. Furthermore, the random effect of holes nested within trees had the greatest impact on variation in differences between treatments, but another unknown source also contributed to the observed variation. These results support the hypothesis that consumers partly drive exudate production, and although it is unknown what other factors, such as fungal load and healing trajectory, may influence variation between treatments, we conclude that pygmy marmosets can stimulate exudate production by consuming exudates.

Supernatural norm enforcement: Thinking about Karma and God reduces selfishness among believers

2018 ◽  
Author(s):  
Cindel White ◽  
John Michael Kelly ◽  
Azim Shariff ◽  
Ara Norenzayan
Keyword(s):  
Social Norms ◽  
Framing Effects ◽  
Demographic Variables ◽  
Exclusion Criteria ◽  
Total N ◽  
Norm Enforcement ◽  
Dictator Games ◽  
Within Subjects

Four experiments (total N = 3591) examined how thinking about Karma and God increases adherence to social norms that prescribe fairness in anonymous dictator games. We found that (1) thinking about Karma decreased selfishness among karmic believers across religious affiliations, including Hindus, Buddhists, Christians, and non-religious Americans; (2) thinking about God also decreased selfishness among believers in God (but not among non-believers), replicating previous findings; and (3) thinking about both karma and God shifted participants’ initially selfish offers towards fairness (the normatively prosocial response), but had no effect on already fair offers. These supernatural framing effects were obtained and replicated in high-powered, pre-registered experiments and remained robust to several methodological checks, including hypothesis guessing, game familiarity, demographic variables, between- and within-subjects designs, and variation in data exclusion criteria. These results support the role of culturally-elaborated beliefs about supernatural justice as a motivator of believer’s adherence to prosocial norms.

Human Physical Aggression as a Function of Frustration: Role of Aggressive Cues

1986 ◽  
Vol 59 (1) ◽  
pp. 103-110 ◽  
Author(s):  
Roland Gustafson
Keyword(s):  
Physical Aggression ◽  
Instrumental Value ◽  
Pull Out ◽  
Within Subjects

An experiment was performed testing whether aggressive cues are necessary or only facilitative in increasing aggression to a frustration and whether their role is to “pull out” aggression directly or to add to the experience of displeasure. 20 subjects participated and a modified version of the Buss' “aggression machine” was used in which frustration was manipulated within subjects and aggressive cues between subjects. Frustration was of an arbitrary kind and aggression was defined to subjects to have instrumental value in overcoming the frustrative event Results indicated that (1) frustration alone is a weak antecedent of aggression, (2) at low frustration aggressive cues seem to be necessary for aggression to increase, and (3) aggressive cues apparently elicit aggression directly. Results were discussed in terms of Berkowitz' reformulation of the frustration-aggression hypothesis.

scholarly journals Analysing the Influence of Industrial Value - Added of Small and Micro-sized Firms on Regional FDI in Indonesia

2021 ◽  
Vol 5 (3) ◽  
pp. 157-165
Author(s):  
Celine Canes ◽  
Vanessa Aurelia ◽  
Juan Phillip Yoel Tanesia ◽  
Albert Hasudungan ◽  
Erica Lukas
Keyword(s):  
Capital Accumulation ◽  
Random Effect ◽  
Value Added ◽  
Dual Function ◽  
Robust Standard Error ◽  
The Government ◽  
Role Of The Government ◽  
Fdi Determinants ◽  
Portfolio Investments

The role of Foreign Direct Investment (FDI) has only grown in tandem with globalization, as it plays a dual function by improving capital accumulation whilst simultaneously growing total factor yield, which puts it at an advantage over foreign aids and foreign portfolio investments. Using panel data from 34 Indonesian provinces over the 2015 - 2019 period, this research examined the determinants of provincial FDI and its impact on regional economic development in Indonesia. The random effect method with robust standard error was used to regress the model, and the variables found to be positively significant were the ratio of industrial value added for micro sized firms to regional GDP, as well as the growth rate of industrial value added for small sized firms. Our analysis revealed that micro-sized firms tend to have much higher industrial value added compared to small-sized firms, and that these firms tend to cluster in Western Indonesia. The role of the government should be to foster the growth and competitiveness of small and micro-sized firms, especially for regions where the industrial value added is still low. Further study is suggested on the determinants of industrial value added at the provincial level, as well as more comprehensive research on FDI determinants with a larger dataset.

scholarly journals Conditional Control of Instrumental Avoidance by Context Following Extinction

2021 ◽  
Vol 15 ◽  
Author(s):  
Vincent D. Campese ◽  
Lauren A. Brannigan ◽  
Joseph E. LeDoux
Keyword(s):  
Hierarchical Control ◽  
Response Rates ◽  
Training Context ◽  
Extinction Learning ◽  
Retention Testing ◽  
Conditional Control ◽  
Within Subjects ◽  
Pavlovian Extinction ◽  
Contrast Response

Using rodents, three training arrangements (i.e., ABB vs. ABA, AAA vs. AAB and ABB vs. ABC) explored whether extinction influences the expression of avoidance in a manner controlled by context. Retention testing following extinction showed that more avoidance responding (i.e., renewal) was observed when extinguished cues were tested outside of the context where they had undergone extinction. In contrast, response rates were significantly lower when stimuli were tested within the context where extinction learning had occurred. These findings add to the emerging literature assessing the role of Pavlovian extinction processes in the development of instrumental avoidance responding by demonstrating conditional control over extinguished responding by context. This study was conducted using a within-subjects approach that minimized the potential for context-outcome associations to bias responding, and thus, reflects hierarchical control over behavior based on the specific associative status of each tested cue in each training context.

The role of brand personality in the formation of consumer affect and self-brand connection

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Justin F. McManus ◽  
Sergio W. Carvalho ◽  
Valerie Trifts
Keyword(s):  
Personality Traits ◽  
Design Methodology ◽  
Brand Personality ◽  
Content Type ◽  
Mediation Analyses ◽  
Within Subjects ◽  
The Relationship ◽  
Different Levels ◽  
Brand Personality Traits

Purpose This study aims to explore the role of brand personality traits in explaining how different levels of brand favorability evoke affect from and forge connections to consumers. Design/methodology/approach The authors used a quantitative approach consisting of within-subjects (Study 1) and between-subjects (Study 2) experimental designs. Mediation analyses were tested using OLS regression with the MEMORE and PROCESS macros. Findings Findings suggest increases in brand excitement and sincerity to be related to differences in positive affect evoked by favorable and unfavorable brands; decreases in brand sincerity to be related to differences in negative affect between favorable and unfavorable brands (Study 1); brand competence and excitement to be related to the relationship between brand favorability and self-brand connection; and brand competence and excitement to best distinguish favorable brands from unfavorable brands (Study 2). Originality/value These results support the importance of brand personality traits that are considered to be universally positive and provide managers with an initial roadmap for which brand personality traits should be prioritized when communicating with consumers.

Can financial inclusion reduce the presence of corruption? Evidence from selected countries in Africa

2020 ◽  
Vol 47 (11) ◽  
pp. 1345-1362
Author(s):  
Folorunsho M. Ajide
Keyword(s):  
Random Effect ◽  
Secondary Data ◽  
Threshold Level ◽  
Financial Inclusion ◽  
Least Square ◽  
African Countries ◽  
Content Type ◽  
The Impact ◽  
Control Of Corruption

PurposeThe purpose of this paper is to evaluate the impact of financial inclusion (FI) on control of corruption in selected African countries.Design/methodology/approachThe study employs secondary data spanning over a period of 2005–2016. These data are sourced from IMF's International Financial Statistics, World Bank Development Indicators, Global Financial Development Database, Transparency International and International Country Risk Guide. The author uses Sarma (2008) approach to construct the FI index for 13 countries in Africa. The author applies random effect, robust least square and instrumental variable (IV) estimations to examine the impact of FI on control of corruption in Africa.FindingsThe author finds that financial inclusion improves the control of corruption. The author tests for possible FI threshold to avoid the case of extreme FI in Africa. The results show that there is a threshold level if reached, FI would have negative impacts in the control of corruption. This may likely happen mainly due to weak institutions in Africa. The results are robust to alternative proxy for control of corruption and various alternative estimation techniques.Practical implicationsThe finding indicates that FI can serve as part of toolkits for reducing corruption in Africa.Originality/valueThis study stresses the important role of FI in the economic system. It is the first paper that empirically suggests the role of FI in controlling corruption in Africa.

Insurance regulations, risk and performance in Ghana

2019 ◽  
Vol 28 (1) ◽  
pp. 74-96
Author(s):  
Baah Aye Kusi ◽  
Abdul Latif Alhassan ◽  
Daniel Ofori-Sasu ◽  
Rockson Sai
Keyword(s):  
Random Effect ◽  
Least Square ◽  
Insurance Market ◽  
Content Type ◽  
Ordinary Least Square ◽  
Negative Effect ◽  
And Performance ◽  
First Time

Purpose This study aims to examine the hypothesis that the effect of insurer risks on profitability is conditional on regulation, using two main regulatory directives in the Ghanaian insurance market as a case study. Design/methodology/approach This study used the robust ordinary least square and random effect techniques in a panel data of 30 insurers from 2009 to 2015 to test the research hypothesis. Findings The results suggest that regulations on no credit premium and required capital have insignificant effects on profitability of insurers. On the contrary, this study documents evidence that both policies mitigate the effect of underwriting risk on profitability and suggests that regulations significantly mitigate the negative effect of underwriting risk to improve profitability. Practical implications The finding suggests that policymakers and regulators must continue to initiate, design and model regulations such that they help tame risk to improve the performance of insurers in Ghana. Originality/value This study provides first-time evidence on the role of regulations in controlling risks in a developing insurance market.

scholarly journals METABOLIC SYNDROME AND LATE-LIFE DEPRESSION AMONG MEXICAN AMERICANS: THE ROLE OF NATIVITY

2019 ◽  
Vol 3 (Supplement_1) ◽  
pp. S320-S320
Author(s):  
Weihui Zhang
Keyword(s):  
Metabolic Syndrome ◽  
Sex Education ◽  
Psychological Health ◽  
Mexican Americans ◽  
Random Effect ◽  
Epidemiologic Study ◽  
Self Report ◽  
Foreign Born ◽  
Late Life Depression

Abstract Metabolic syndrome (MS) has been reported to predict depression. However, studies evaluating if there are differences by nativity status among Mexican Americans are scarce. This study aims to examine the association between metabolic syndrome and depression among Mexican-American older adults. We also evaluated the role of nativity, sociodemographic and health risk factors. We use three waves (2006-2013) from the Hispanic Established Populations for the Epidemiologic Study of the Elderly (HEPESE; N=1,542, mean age =83.45 in 2006). MS was defined according to the National Cholesterol Education Programme (NCEP-ATP III) using abdominal obesity, use of antihypertensive medication, and insulin. Depression was ascertained by self-report of a CES-D score greater than 16. We applied random-effect logistic regression models which accounted for inter-individual correlation and adjusted for age, sex, education, smoking, alcohol use, physical performance, and self-esteem. We also tested for interaction between MS and nativity. Approximately 30% of foreign-born and 22% of US-born reported depression. The prevalence of MS was higher in the Foreign-born when compare to the US-born (5.89% vs. 5.35%). In the total sample, MS was associated with a higher risk of depression (OR=4.34, p=0.007). Foreign-born Mexican Americans were more likely to have depression (OR=1.70, p=0.002) when compared to US-born; however, foreign-born with MS reported lower depression (OR=0.26, p=0.052) after adjusting for potential confounders. Our finding adds to the concept of “metabolic depression,” and further highlights the importance of evaluating nativity to explain the differences in physical and psychological health among a sample of the Hispanic population at old age.

Facial Identity Memory Is Enhanced When Sender’s Expression Is Congruent to Perceiver’s Experienced Emotion

2017 ◽  
Vol 121 (5) ◽  
pp. 892-908
Author(s):  
Marilyn Mendolia
Keyword(s):  
Social Context ◽  
Emotional Expression ◽  
Negative Emotion ◽  
Mixed Design ◽  
Identity Recognition ◽  
Facial Identity ◽  
The Social ◽  
Within Subjects ◽  
Experienced Emotion

The role of the social context in facial identity recognition and expression recall was investigated by manipulating the sender’s emotional expression and the perceiver’s experienced emotion during encoding. A mixed-design with one manipulated between-subjects factor (perceiver’s experienced emotion) and two within-subjects factors (change in experienced emotion and sender’s emotional expression) was used. Senders’ positive and negative expressions were implicitly encoded while perceivers experienced their baseline emotion and then either a positive or a negative emotion. Facial identity recognition was then tested using senders’ neutral expressions. Memory for senders previously seen expressing positive or negative emotion was facilitated if the perceiver initially encoded the expression while experiencing a positive or a negative emotion, respectively. Furthermore, perceivers were confident of their decisions. This research provides a more detailed understanding of the social context by exploring how the sender–perceiver interaction affects the memory for the sender.

Arterial baroreceptors control plasma vasopressin responses to graded hypotension in conscious dogs

2000 ◽  
Vol 278 (2) ◽  
pp. R469-R475 ◽  
Author(s):  
Terry N. Thrasher ◽  
Hong-Gen Chen ◽  
Lanny C. Keil
Keyword(s):  
Inferior Vena ◽  
Control Period ◽  
Vena Cava ◽  
Plasma Renin ◽  
Conscious Dogs ◽  
Inferior Vena Caval ◽  
Arterial Baroreceptors ◽  
Treatment Conditions ◽  
The Individual

We studied the role of cardiac and arterial baroreceptors in the reflex control of arginine vasopressin (AVP) and renin secretion during graded hypotension in conscious dogs. The dogs were prepared with Silastic cuffs on the thoracic inferior vena cava and catheters in the pericardial space. Each experiment consisted of a control period followed by four periods of inferior vena caval constriction, during which mean arterial pressure (MAP) was reduced in increments of ∼10 mmHg. The hormonal responses were measured in five dogs under four treatment conditions: 1) intact, 2) acute cardiac denervation (CD) by intrapericardial infusion of procaine, 3) after sinoaortic denervation (SAD), and 4) during combined SAD+CD. The individual slopes relating MAP to plasma AVP and plasma renin activity (PRA) were used to compare the treatment effects using a 2 × 2 factorial analysis. There was a significant ( P < 0.01) effect of SAD on the slope relating plasma AVP to MAP but no effect of CD and no SAD × CD interaction. In contrast, the slope relating PRA and MAP was increased ( P < 0.05) by SAD but was not affected by CD. These results support the hypothesis that stimulation of AVP secretion in response to graded hypotension is primarily driven by unloading arterial baroreceptors in the dog.

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