A hybrid POMDP-BDI agent architecture with online stochastic planning and plan caching

This article presents an agent architecture for controlling an autonomous agent in stochastic, noisy environments. The architecture combines the partially observable Markov decision process (POMDP) model with the belief-desire-intention (BDI) framework. The Hybrid POMDP-BDI agent architecture takes the best features from the two approaches, that is, the online generation of reward-maximizing courses of action from POMDP theory, and sophisticated multiple goal management from BDI theory. We introduce the advances made since the introduction of the basic architecture, including (i) the ability to pursue and manage multiple goals simultaneously and (ii) a plan library for storing pre-written plans and for storing recently generated plans for future reuse. A version of the architecture is implemented and is evaluated in a simulated environment. The results of the experiments show that the improved hybrid architecture outperforms the standard POMDP architecture and the previous basic hybrid architecture for both processing speed and effectiveness of the agent in reaching its goals.     

The evolutionary basis of risky adolescent behavior: implications for science, policy, and practice

This article proposes an evolutionary model of risky behavior in adolescence and contrasts it with the prevailing developmental psychopathology model. The evolutionary model contends that understanding the evolutionary functions of adolescence is critical to explaining why adolescents engage in risky behavior and that successful intervention depends on working with, instead of against, adolescent goals and motivations. The current article articulates 5 key evolutionary insights into risky adolescent behavior: (a) The adolescent transition is an inflection point in development of social status and reproductive trajectories; (b) interventions need to address the adaptive functions of risky and aggressive behaviors like bullying; (c) risky adolescent behavior adaptively calibrates over development to match both harsh and unpredictable environmental conditions; (d) understanding evolved sex differences is critical for understanding the psychology of risky behavior; and (e) mismatches between current and past environments can dysregulate adolescent behavior, as demonstrated by age-segregated social groupings. The evolutionary model has broad implications for designing interventions for high-risk youth and suggests new directions for research that have not been forthcoming from other perspectives.     

Information‐Seeking Strategies,Uncertainty, and Computer‐Mediated Communication

This article argues that existing theory and research on computer‐mediated communication (CMC) provide a limited view of information‐seeking behavior and proposes a conceptual model for its examination via CMC and new media. Although most CMC environments eliminate or severely reduce nonverbal and contextual information available to address uncertainty, form impressions, and develop relationships, such environments offer alternative mechanisms for acquiring social information about others. The article discusses strategies for seeking social information and identifies factors influencing their selection from alternatives, incorporating them into a conceptual model. Finally, 2 promising approaches for examining the effects and effectiveness of social information seeking in CMC are described, with an emphasis on how the proposed conceptual model can aid in the development of each.     

Gendered Behavior in a Male Preserve: Role Playing at ESPN Zone Chicago

The consumption of spectacular experience is of increasing interest to consumer researchers. Much of this consumption occurs in themed environments. These environments arouse and motivate consumers in multifaceted ways. In this article, we explore the ways in which gendered behavior is elicited and enacted in a sports bar venue. Using ethnographic methods, we examine male role behavior as it is exhibited at ESPN Zone Chicago. We enfold our interpretation of this behavior in theorizing about sport, spectacle, and mass mediation     

A neural model of how the brain computes heading from optic flow in realistic scenes

Visually-based navigation is a key competence during spatial cognition. Animals avoid obstacles and approach goals in novel cluttered environments using optic flow to compute heading with respect to the environment. Most navigation models try either explain data, or to demonstrate navigational competence in real-world environments without regard to behavioral and neural substrates. The current article develops a model that does both. The ViSTARS neural model describes interactions among neurons in the primate magnocellular pathway, including V1, MT⁺, and MSTd. Model outputs are quantitatively similar to human heading data in response to complex natural scenes. The model estimates heading to within 1.5° in random dot or photo-realistically rendered scenes, and within 3° in video streams from driving in real-world environments. Simulated rotations of less than 1°/s do not affect heading estimates, but faster simulated rotation rates do, as in humans. The model is part of a larger navigational system that identifies and tracks objects while navigating in cluttered environments.     

The functional equivalence of problem solving skills

The tower of Hanoi problem is used to show that, even in simple problem environments, numerous distinct solution strategies are available, and different subjects may learn different strategies. Four major classes of solution strategies are described for the problem. Different strategies have different degrees of transferability, place different burdens on short-term memory and on perception, and require different learning processes for their acquisition. The analysis underscores the importance of subject-by-subject analysis of “what is learned” in understanding human behavior in problem-solving situations, and provides a technique for describing subjects' task performance programs in detail.     

Spontaneous social orienting and gaze following in ringtailed lemurs (<Emphasis Type="Italic">Lemur catta</Emphasis>)

Both human and nonhuman primates preferentially orient toward other individuals and follow gaze in controlled environments. Precisely where any animal looks during natural behavior, however, remains unknown. We used a novel telemetric gaze-tracking system to record orienting behavior of ringtailed lemurs (Lemur catta) interacting with a naturalistic environment. We here provide the first evidence that ringtailed lemurs, group-living prosimian primates, preferentially gaze towards other individuals and, moreover, follow other lemurs’ gaze while freely moving and interacting in naturalistic social and ecological environments. Our results support the hypothesis that stem primates were capable of orienting toward and following the attention of other individuals. Such abilities may have enabled the evolution of more complex social behavior and cognition, including theory of mind and language, which require spontaneous attention sharing. This is the first study to use telemetric eye-tracking to quantitatively monitor gaze in any nonhuman animal during locomotion, feeding, and social interaction. Moreover, this is the first demonstration of gaze following by a prosimian primate and the first to report gaze following during spontaneous interaction in naturalistic social environments. Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users.     

Ingroup Experts and Peers as Social Vaccines Who Inoculate the Self-Concept: The Stereotype Inoculation Model

Individuals’ choice to pursue one academic or professional path over another may feel like a free choice but is often constrained by subtle cues in achievement environments that signal who naturally belongs there and who does not. People gravitate toward achievement domains that feel like a comfortable fit because they are in sync with ingroup stereotypes and away from other domains that feel like an uncomfortable fit because they deviate too far from ingroup stereotypes. Even individuals who are high performers may lack confidence in their ability and withdraw from certain achievement domains—performance and self-efficacy do not always go hand in hand. What factors might release these constraints and enhance individuals’ freedom to pursue academic and professional paths despite stereotypes to the contrary? The present article addresses this question using a new theoretical lens—the stereotype inoculation model—that reveals how ingroup members (experts and peers in high-achievement settings) function as “social vaccines” who increase social belonging and inoculate fellow group members’ self-concept against stereotypes. The model integrates insights from several literatures in social psychology and organizational behavior to articulate predictions accompanied by supporting evidence about when ingroup experts and peers serve as social vaccines and the underlying psychological mechanisms. The article concludes by identifying directions for future research, possible interventions, and policy implications of the model.     

How a visual surveillance system hypothesizes how you behave

In the last few years, the installation of a large number of cameras has led to a need for increased capabilities in video surveillance systems. It has, indeed, been more and more necessary for human operators to be helped in the understanding of ongoing activities in real environments. Nowadays, the technology and the research in the machine vision and artificial intelligence fields allow one to expect a new generation of completely autonomous systems able to reckon the behaviors of entities such as pedestrians, vehicles, and so forth. Hence, whereas the sensing aspect of these systems has been the issue considered the most so far, research is now focused mainly on more newsworthy problems concerning understanding. In this article, we present a novel method for hypothesizing the evolution of behavior. For such purposes, the system is required to extract useful information by means of low-level techniques for detecting and maintaining track of moving objects. The further estimation of performed trajectories, together with objects classification, enables one to compute the probability distribution of the normal activities (e.g., trajectories). Such a distribution is defined by means of a novel clustering technique. The resulting clusters are used to estimate the evolution of objects’ behaviors and to speculate about any intention to act dangerously. The provided solution for hypothesizing behaviors occurring in real environments was tested in the context of an outdoor parking lot.     

The critical role of nurturing environments for promoting human well-being

The recent Institute of Medicine report on prevention (National Research Council & Institute of Medicine, 2009) noted the substantial interrelationship among mental, emotional, and behavioral disorders and pointed out that, to a great extent, these problems stem from a set of common conditions. However, despite the evidence, current research and practice continue to deal with the prevention of mental, emotional, and behavioral disorders as if they are unrelated and each stems from different conditions. This article proposes a framework that could accelerate progress in preventing these problems. Environments that foster successful development and prevent the development of psychological and behavioral problems are usefully characterized as nurturing environments. First, these environments minimize biologically and psychologically toxic events. Second, they teach, promote, and richly reinforce prosocial behavior, including self-regulatory behaviors and all of the skills needed to become productive adult members of society. Third, they monitor and limit opportunities for problem behavior. Fourth, they foster psychological flexibility-the ability to be mindful of one's thoughts and feelings and to act in the service of one's values even when one's thoughts and feelings discourage taking valued action. We review evidence to support this synthesis and describe the kind of public health movement that could increase the prevalence of nurturing environments and thereby contribute to the prevention of most mental, emotional, and behavioral disorders. This article is one of three in a special section (see also Mu?oz Beardslee, & Leykin, 2012; Yoshikawa, Aber, & Beardslee, 2012) representing an elaboration on a theme for prevention science developed by the 2009 report of the National Research Council and Institute of Medicine.     

Modeling Mental Spatial Reasoning About Cardinal Directions

This article presents research into human mental spatial reasoning with orientation knowledge. In particular, we look at reasoning problems about cardinal directions that possess multiple valid solutions (i.e., are spatially underdetermined), at human preferences for some of these solutions, and at representational and procedural factors that lead to such preferences. The article presents, first, a discussion of existing, related conceptual and computational approaches; second, results of empirical research into the solution preferences that human reasoners actually have; and, third, a novel computational model that relies on a parsimonious and flexible spatio‐analogical knowledge representation structure to robustly reproduce the behavior observed with human reasoners.     

Illegal downloading of pop music among university students in Taiwan: An agent‐based model simulation

The lifestyle and consumption patterns of the current mobile generation (m‐generation), born after the Internet gained popularity, have changed dramatically. This study investigated university students' consumption attitude toward pop music and their behavior of illegally downloading such music by considering different law enforcement environments. In the first stage of our study, we designed and administered a questionnaire survey and collected 424 responses. The valid sample size was 394. On the basis of the sample, we developed a behavioral model that could be customized according to individual observation. In the second stage, we developed an agent‐based model for performing a simulation. This study divided law enforcement environments into combinations of the probability of being arrested engaging in illegal downloading behavior and the financial penalty after being caught. The results revealed that in an environment where the strength of law enforcement is increased, the agents' willingness to illegally download music in the model decreases. This empirical study highlighted that the deterrent effects in both the real world and simulated model were more sensitive to the probability of being caught primarily because of illegal downloading behavior. Therefore, the study suggests that for the m‐generation of the post‐Internet age, the most feasible approach to achieving instant results is through effective and certain law enforcement, which can effectively reduce the copyright infringement in the pop music industry caused by illegal downloading. Copyright © 2017 John Wiley & Sons, Ltd.     

Executive Function: The Search for an Integrated Account

ABSTRACT— In general, executive function can be thought of as the set of abilities required to effortfully guide behavior toward a goal, especially in nonroutine situations. Psychologists are interested in expanding the understanding of executive function because it is thought to be a key process in intelligent behavior, it is compromised in a variety of psychiatric and neurological disorders, it varies across the life span, and it affects performance in complicated environments, such as the cockpits of advanced aircraft. This article provides a brief introduction to the concept of executive function and discusses how it is assessed and the conditions under which it is compromised. A short overview of the diverse theoretical viewpoints regarding its psychological and biological underpinnings is also provided. The article concludes with a consideration of how a multilevel approach may provide a more integrated account of executive function than has been previously available.     

Use of virtual environments to investigate development of spatial behavior and spatial knowledge of school-age children

This review aims to show the potential of using virtual environments in developmental spatial cognition research to advance empirical knowledge and theoretical insight. The facility for easy and economic variations of environmental features, the active, self-determined exploration, and the reliable registration of the navigation behavior using virtual environments allow investigating the development of spatial behavior and spatial knowledge in more detail. As a consequence, a dissociation between spatial behavior and spatial knowledge was observed, leading to the conclusion that spatial context has to be integrated further in any theoretical model regarding development of spatial cognition.     

The new look of behavioral genetics in developmental psychopathology: gene-environment interplay in antisocial behaviors

This article reviews behavioral-genetic research to show how it can help address questions of causation in developmental psychopathology. The article focuses on studies of antisocial behavior, because these have been leading the way in investigating environmental as well as genetic influences on psychopathology. First, the article illustrates how behavioral-genetic methods are being newly applied to detect the best candidates for genuine environmental causes among the many risk factors for antisocial behavior. Second, the article examines findings of interaction between genes and environments (G x E) associated with antisocial behavior, outlining steps for testing hypotheses of measured G x E. Third, the article envisages future work on gene-environment interplay, arguing that it is an interesting and profitable way forward for psychopathology research.     

Career counseling: beyond “test and tell”

Behavior-oriented inventories need not be used in a static manner. This article presents a way of using John Holland's Self-Directed Search (SDS) as an illustration of how such an inventory can be employed dynamically within a developmental career counseling framework. Use of the SDS is discussed in terms of environmental exploration, self-exploration, and integration of information. The breadth of individual behavior styles and the flexibility of work environments are the key concepts in the approach to career counseling described here.     

Social Context in HCl: A New Framework for Mental Models,Cooperation, and Communication

This article considers current research in computer-supported cooperative work (CSCW), computer-mediated communication (CMC), and distributed artificial intelligence (DAl). These areas need an articulated model of social contexts to bridge the persisting gap between social and technological dimensions in computer system design and use. A conceptual model of context is presented to account for both cooperation-conflict and communication-negotiation processes. The model conceives of contexts as including not only physical objects and other people but also social norms which influence both individuals and organizations. It assumes that computer system use occurs in social scenarios in which the features cannot be reduced to any type of input or data in the world that designers and users can process along with other information coming from the current task. The model is built on three levels: from social contexts as normative order (Level 1), to specific and intrinsically complex situations (Level 2), to person-computer interactions for the performance of particular tasks (Level 3). The model has three main implications. First, Human-Computer Interaction (HCl) studies—especially scenario-based design—may profit from a fresh topdown approach to designers' and users' mental models taking into account normative social processes which have been neglected in previous research. Second, CSCW may realize how deeply discrepant perspectives affect multi-agent environments and why in real working life negotiation is intertwined with cooperation. Designers may use this insight to design systems allowing more place for negotiation among actors. Third, we should dismiss the view that CMC lacks adequate social cues and fosters impulsive behavior. Cognitive processes such as categorization, stereotype construction, and social identification can make electronic environments even more strongly sensible to social norms than face-to-face communication. Context, according to our model, is not restricted to the physical copresence of other people but consists mainly of processes providing situations with socially recognizable meaning.     

I. The loving parent meets the selfish gene

In a recent Inquiry article Louis Pascal argues that the problem of massive starvation in the modern world is the result of a genetically‐based human propensity to produce as many offspring as possible, regardless of ecological conditions. In this paper biological and anthropological objections to Pascal's thesis are discussed as well as the conclusions he draws from it. It is suggested that natural selection has produced humans who are flexible in their reproductive behavior in order to cope with rapidly changing environments. The implications of both arguments for the population movement and the attempt to eliminate starvation are discussed.