Modelling simultaneous games in dynamic logic

We make a proposal for formalizing simultaneous games at the abstraction level of player’s powers, combining ideas from dynamic logic of sequential games and concurrent dynamic logic. We prove completeness for a new system of ‘concurrent game logic’ CDGL with respect to finite non-determined games. We also show how this system raises new mathematical issues, and throws light on branching quantifiers and independence-friendly evaluation games for first-order logic.     

Similarity based approximate reasoning: fuzzy control

This paper presents an approach to similarity based approximate reasoning that elucidates the connection between similarity and existing approaches to inference in approximate reasoning methodology. A set of axioms is proposed to get a reasonable measure of similarity between two fuzzy sets. The similarity between the fact(s) and the antecedent of a rule is used to modify the relation between the antecedent and the consequent of the rule. An inference is drawn using the well-known projection operation on the domain of the consequent. Zadeh's compositional rule of inference and existing similarity based reasoning techniques are considered for a new similarity based approximate reasoning technique. The proposed mechanism is used to develop a modified fuzzy control system. A new defuzzification scheme is proposed. Simulation results are presented for the well-known inverted pendulum problem.     

Is What You Feel What They See? Prominent and Subtle Identity Signaling in Intergroup Interactions

Individuals often signal group affiliations to others, and the display of such identity signals is frequently rather subtle. While prior work has focused on understanding an individual's choices of subtle versus prominent signals, in this work, we look at the downstream consequences of such choices. Specifically, we explore how the prominence of identity signals may affect one's behavior in intergroup interactions. Drawing from literature on processing fluency, we propose that the use of difficult to process (subtle) identity signals in intergroup interactions leads signalers to experience identity threat, lowering confidence in their identity and leading them to engage in behaviors to recover from this experience. Across three different identity domains (college affiliation, political affiliation, and brand loyalty), we show that when individuals use difficult to process identity signals, they derogate out‐group members in communication and behave less cooperatively in intergroup interactions. We find that these effects depend upon the observability of the signals by out‐group members and only occur for individuals who are highly identified with the in‐group. We also find that the effects are attenuated when behavior towards members of the out‐group is made public. Copyright © 2017 John Wiley & Sons, Ltd.     

Attachment style,partner communication,and physical well‐being among couples coping with cancer

Attachment styles may influence interpersonal strategies used to cope with stress. We examined links between attachment style, communicative behaviors, and physical well‐being among 166 couples coping with cancer. Results of actor–partner interdependence mediation models indicated that insecure attachment styles were associated with greater self‐report of two different and seemingly contradictory communicative behaviors (disclosure and holding back), which in turn were associated with poorer physical well‐being. These effects were intrapersonal for both patients and spouses, with the exception of anxious attachment and holding back for spouses. They were also interpersonal in that spouse insecure attachment was associated with poorer patient physical well‐being through spouse communication (greater holding back and disclosure). Couple‐based communication interventions to support adjustment should consider attachment style.     

Nonstrategic Delay in Bargaining: An Experimental Investigation

The practice of bargaining is strongly affected by procedural features. Procedures matter because they affect each party's bargaining power and, consequently, the negotiation outcome. The extent and nature of delay between offers and counteroffers are an example of procedural specification in bargaining. Bargaining models consider delay only as a strategic screening device to build a reputation for toughness, the logic being that the party with the smaller cost of delay obtains all the gain from trade. In reality, however, delay between offers is common because of imperfect player control over the duration of the offers for reasons other than strategic, namely, transactional, timing, and interruptions. This delay, in essence, limits the number of rounds of offers and counteroffers in a fixed-period negotiation compared to when there is no delay and, in turn, is expected to affect negotiation outcome. The objective of the current research is to experimentally explore the implications of nonstrategic delay between offers and counteroffers in a finite-horizon alternating-offer bargaining game with incomplete information but without discounting. Specifically, this study examines the effect of nonstrategic time delay during negotiation on (1) the effect of risk preference on negotiator effectiveness, (2) deadline effect, (3) first-mover advantage, and (4) conflict between the negotiating partners. As hypothesized, the results show that delay dilutes the effect of negotiators’ risk preference, eliminates the deadline effect, negates the first-mover advantage, and enhances dyadic conflict.     

Positive Psychology Interventions for Chronic Physical Illnesses: A Systematic Review

Positive health focuses on enhancing health along with curing illness to bring about well-being. Treatment for physical illness generally involves drug therapy, while the psycho-social aspects, specifically the positive psychology perspectives, are largely ignored; nevertheless, a growing number of investigations are now studying the effects of positive psychology interventions on health outcomes. The objective of this paper is to systematically review positive psychology interventions in chronic physical illness. A literature search through the databases of EBSCO, PubMed and PsycINFO, reference lists of significant papers and grey literature was conducted following four criteria set for this review. The number of studies selected finally that acceded to the criteria was 14. These studies were analysed by focusing on the study characteristics, kinds of intervention and outcomes of positive psychology interventions. Overall findings reveal that different intervention programmes have been devised by combining various exercises, writing is the most commonly used method for administration and positive psychology interventions are considered feasible and acceptable by patients, but findings about their usefulness are inconclusive. Suggestions for future research, clinical practice and application in communities have been provided which may be useful for clinicians, practitioners and caregivers.     

Differences in problem-solving between canid populations: Do domestication and lifetime experience affect persistence?

Past research has suggested that a variety of factors, phylogenetic and ontogenetic, play a role in how canines behave during problem-solving tasks and the degree to which the presence of a human influences their problem-solving behaviour. While comparisons between socialized wolves and domestic dogs have commonly been used to tease apart these predictive factors, in many cases a single dog population, often pets, have been used for these comparisons. Less is understood about how different populations of dogs may behave when compared with wolves, or with each other, during an independent problem-solving task. This experiment compared the independent persistence of four populations of canines (two groups of pet domestic dogs, a group of free-ranging domestic dogs, and human-socialized wolves) on an independent problem-solving task in the presence of an on looking human. Results showed that wolves persisted the most at the task while free-ranging dogs persisted the least. Free-ranging dogs gazed at the human experimenter for the longest durations during the task. While further research is needed to understand why these differences exist, this study demonstrates that dogs, even those living outside human homes as scavengers, show comparatively low levels of persistence when confronted with a solvable task in the presence of a human as well as significantly greater duration of human-directed gaze when compared with wolves.     

Practice makes perfect: familiarity of task determines success in solvable tasks for free-ranging dogs (<Emphasis Type="Italic">Canis lupus familiaris</Emphasis>)

Domestic dogs’ (Canis lupus familiaris) socio-cognitive faculties have made them highly sensitive to human social cues. While dogs often excel at understanding human communicative gestures, they perform comparatively poorly in problem-solving and physical reasoning tasks. This difference in their behaviour could be due to the lifestyle and intense socialization, where problem solving and physical cognition are less important than social cognition. Free-ranging dogs live in human-dominated environments, not under human supervision and are less socialized. Being scavengers, they often encounter challenges where problem solving is required in order to get access to food. We tested Indian street dogs in familiar and unfamiliar independent solvable tasks and quantified their persistence and dependence on a novel human experimenter, in addition to their success in solving a task. Our results indicate that free-ranging dogs succeeded and persisted more in the familiar task as compared to the unfamiliar one. They showed negligible amount of human dependence in the familiar task, but showed prolonged gazing and considerable begging behaviour to the human experimenter in the context of the unfamiliar task. Cognitive abilities of free-ranging dogs thus play a pivotal role in determining task-associated behaviours based on familiarity. In addition to that, these dogs inherently tend to socialize with and depend on humans, even if they are strangers. Our results also illustrate free-ranging dogs’ low competence at physical cognitive tasks.     

“SCIENCE–RELIGION SAMVADA” AND THE INDIAN CULTURAL HERITAGE

This article seeks to delineate some of the fundamental philosophical traits that are special characteristics of the Indian cultural soil. Tracing these from the Vedic period, it is shown that this heritage is still alive and gives a distinctive flavor to the science–religion dialogue in the Indian context. The prevalent attitude is not to view science and religion as antagonistic, but rather as forces that together could create a world where the persistent epistemological and ethical problems can get resolved to the benefit of humanity. In Indian thought rationality and spirituality are not viewed as opposed categories. The notion of “evidence” has played a crucial role in all enquiries for legitimizing the sources of knowledge and the criteria by which any claim to knowledge can be tested. References to investigations pertaining to such areas as cosmology, ecology, ethics, study of consciousness, and so on are made in order to bring out their relevance for science–religion dialogue today.