Infants Show Ratio‐dependent Number Discrimination Regardless of Set Size

Evidence for approximate number system (ANS) representations in infancy is robust but has typically only been found when infants are presented with arrays of four or more elements. In addition, several studies have found that infants fail to discriminate between small numbers when continuous variables such as surface area and contour length are controlled. These findings suggest that under some circumstances, infants fail to recruit either the ANS or object file representations for small sets. Here, we used a numerical change detection paradigm to assess 6‐month‐old infants' ability to represent small values. In Experiment 1, infants were tested with 1 versus 3, 1 versus 2, and 2 versus 3 dots. Infants successfully discriminated 1 versus 3 and 1 versus 2, but failed with 2 versus 3. In Experiment 2, we tested whether infants could compare small and large values with a 2 versus 4 condition. Across both experiments, infants' performance exhibited ratio dependence, the hallmark of the ANS. Our results indicate that infants can attend to the purely numerical attributes of small sets and that the numerical change detection paradigm accesses ANS representations in infancy regardless of set size.     

Multilevel Risk and Protective Factors for Intimate Partner Violence Among African,Asian, and Latina Immigrant and Refugee Women: Perceptions of Effective Safety Planning Interventions

Immigrant and refugee women are at high risk for intimate partner violence (IPV) and intimate partner homicide (IPH). Given the growing number of immigrants and refugees in the US and the concerns about IPV and IPH among immigrant and refugee groups, this paper aims to identify survivors and practitioners’ perceptions of (a) common and culturally specific risk and protective factors for IPV and IPH for immigrant and refugee women and (b) areas of safety planning interventions for survivors who are at risk for severe or lethal violence by an intimate partner. Qualitative data for this multi-site study were collected from women and practitioners residing in seven geographically diverse US locations. Eighty-three in-depth interviews were conducted with adult immigrant and refugee survivors of IPV, who identified as Asian (n?=?30), Latina (n?=?30), and African (n?=?23). Additionally, nine focus groups and five key informant interviews were conducted with practitioners (n?=?62) who serve immigrant and refugee survivors of IPV. Results revealed multilevel risk and protective factors for IPV/IPH found at the societal level (e.g., patriarchal cultural norms), relationship level (e.g., partner abusive behaviors), and individual level (e.g., acculturation in the US). These findings can inform the development of culturally responsive risk assessment and safety planning interventions across legal, social service, and healthcare settings.     

Social Fathering in Low‐Income,African American Families with Preschool Children

Although research increasingly focuses on nonresident biological fathers, little attention has been given to the role of other men in children's lives. The authors examine the factors associated with social father presence and their influence on preschoolers' development. Findings indicate that the majority of children have a social father and that mother, child, and nonresident biological father characteristics are all related to social father presence. These associations differ depending on whether the social father is the mother's romantic partner or a male relative. The social father's influence on children's development also depends on his relationship to the child. Male relative social fathers are associated with higher levels of children's school readiness, whereas mothers' romantic partner social fathers are associated with lower levels of emotional maturity.     

Evaluating Cooperative Game Theory in water resources

Two empirical applications of Cooperative Game Theory concerned with regional cooperation in the use of irrigation water are presented. Both studies attempt to derive income maximizing solutions for the participants and the related income allocation schemes. Distinction is made between transferable and non-transferable utility situations. The reasonableness and the acceptability of the schemes derived are later critically evaluated. Main findings are: (1) use of utility functions leads to problems in gains allocations, (2) the Core concept may be useless in this application because since it is either difficult to calculate or is empty in many cases, (3) gains allocation and the derived core are heavily dependent on probabilities of coalitions formation in the Shapley value or the Generalized Shapley Value.During the course of this research in The Hebrew University of Jerusalem.On leave from The Hebrew University of Jerusalem.     

Perceptions of the narrative of the ‘other’ among Arab and Jewish adolescents in Israel: between peace talks and violent events

One of the major challenges for the process of peace building is to overcome the rigid structure of the socio‐psychological repertoire that accompanies it. Our longitudinal study examined one element of this repertoire among Jewish and Arab adolescents in Israel: the cognitive legitimacy and the emotional reactions toward the historical narrative of the opponent. We focused our question on the impact of the socio‐political context and the role of the violent reality in the development of these perceptions among youth. Data were collected in four stages (1999–2000, 2002, 2004, and 2007) among various samples of Arab and Jewish high school students (10th and 12th graders). The results showed that among the Jewish adolescents, the readiness to legitimate Palestinian narratives significantly decreased during violent periods. Among the Arab students, the impact of their difficult status as a Palestinian minority in the State of Israel is reflected in their relatively high level of readiness to accept both narratives. The results are discussed from social, cultural, and developmental perspectives with a focus on the role of the conflictual reality itself in the development of the socio‐psychological repertoire among youth.     

Whitewater: Decentralization of river basin water resource management

This paper focuses on empirically assessing determinants of river basin management decentralization, which is growing in popularity among water resource managers world wide. Measuring decentralization as a shift of decision-making responsibility to water users or governments at the river basin level or below, the analysis sheds light on the decentralization reform process and its success, using primary data from 83 river basins world wide. Contrary to common perception that primarily emergency situations trigger reform, persistent water scarcity is found to be a major stimulus to reform. Similarly, financially well-endowed or -developed basins do not necessarily outperform poor and underdeveloped basins. Conditions improving decentralization performance include: existence of dispute resolution mechanisms; greater financial responsibility of users; and as opposed to traditional thinking, government financial support to basin budget.     

Price Setting With Menu Cost for Multiproduct Firms

We model the decisions of a multiproduct firm that faces a fixed “menu” cost: once it is paid, the firm can adjust the price of all its products. We characterize analytically the steady state firm's decisions in terms of the structural parameters: the variability of the flexible prices, the curvature of the profit function, the size of the menu cost, and the number of products sold. We provide expressions for the steady state frequency of adjustment, the hazard rate of price adjustments, and the size distribution of price changes, all in terms of the structural parameters. We study analytically the impulse response of aggregate prices and output to a monetary shock. The size of the output response and its duration both increase with the number of products; they more than double as the number of products goes from 1 to 10, quickly converging to the response of Taylor's staggered price model.     

Complex Questionnaires

We study a principal–agent model in which the agent is boundedly rational in his ability to understand the principal's decision rule. The principal wishes to elicit an agent's true profile so as to determine whether or not to grant him a certain request. The principal designs a questionnaire and commits himself to accepting certain responses. In designing such a questionnaire, the principal takes into account the bounded rationality of the agent and wishes to reduce the success probability of a dishonest agent who is trying to game the system. It is shown that the principal can construct a sufficiently complex questionnaire that will allow him to respond optimally to agents who tell the truth and at the same time to almost eliminate the probability that a dishonest agent will succeed in cheating.     

Transitioning Transgender: Investigating the Important Aspects of the Transition: A Brief Report

The purpose of this study is to identify important aspects of the transition to facilitate decision-making and improved care for transgender patients by transition-care providers. A survey was used to identify transition aspects deemed significant by transgender persons. Among transgender women, the most important transition elements were legal gender change, hormone therapy, breast augmentation, frontal bone setback, and removal of body hair, and among transgender men, change of dress/clothing, name and legal gender change, speech therapy, hormone therapy, chest reconstruction and breast binding. This information is useful to physicians as they care for transgender patients to better offer transition-related counseling.