Four-Dimensional String/String Duality

We present supersymmetric soliton solutions of the four-dimensional heterotic string corresponding to monopoles, strings and domain walls. These solutions admit the $D=10$ interpretation of a fivebrane wrapped around $5$, $4$ or $3$ of the $6$ toroidally compactified dimensions and are arguably exact to all orders in $\alpha'$. The solitonic string solution exhibits an $SL(2,Z)$ {\it strong/weak coupling} duality which however corresponds to an $SL(2,Z)$ {\it target space} duality of the fundamental string.Comment: 14 page

Getting “Just Deserts” or Seeing the “Silver Lining”: The Relation between Judgments of Immanent and Ultimate Justice

People can perceive misfortunes as caused by previous bad deeds (immanent justice reasoning) or resulting in ultimate compensation (ultimate justice reasoning). Across two studies, we investigated the relation between these types of justice reasoning and identified the processes (perceptions of deservingness) that underlie them for both others (Study 1) and the self (Study 2). Study 1 demonstrated that observers engaged in more ultimate (vs. immanent) justice reasoning for a "good" victim and greater immanent (vs. ultimate) justice reasoning for a "bad" victim. In Study 2, participants' construals of their bad breaks varied as a function of their self-worth, with greater ultimate (immanent) justice reasoning for participants with higher (lower) self-esteem. Across both studies, perceived deservingness of bad breaks or perceived deservingness of ultimate compensation mediated immanent and ultimate justice reasoning respectively. © 2014 Harvey and Callan

Why do we overestimate others’ willingness to pay?

People typically overestimate how much others are prepared to pay for consumer goods and services. We investigated the extent to which latent beliefs about others’ affluence contribute to this overestimation. In Studies 1, 2a, and 2b we found that participants, on average, judge the other people taking part in the study to “have more money” and “have more disposable income” than themselves. The extent of these beliefs positively correlated with the overestimation of willingness to pay (WTP). Study 3 shows that the link between income-beliefs and WTP is causal, and Studies 4, 5a, and 5b show that it holds in a between-group design with a real financial transaction and is unaffected by accuracy incentives. Study 6 examines estimates of others’ income in more detail and, in conjunction with the earlier studies, indicates that participants’ reported beliefs about others’ affluence depend upon the framing of the question. Together, the data indicate that individual differences in the overestimation effect are partly due to differing affluence-beliefs, and that an overall affluence-estimation bias may contribute to the net tendency to overestimate other people’s willingness to pay.This work was funded by Leverhulme Trust grant RPG–2013–148 and Economic and Social Research Council studentship number ES/J500045/1.This is the final version of the article. It first appeared from Society for Judgment and Decision Making/The European Association for Decision Making via http://journal.sjdm.org/15/15909/jdm15909.pd

Age differences in social comparison tendency and personal relative deprivation

We examined age-related differences in social comparison orientation and personal relative deprivation (PRD). In Study 1, participants (N = 1,290) reported their tendencies to engage in social comparisons and PRD. Older adults reported lower levels of social comparison tendency and PRD, and social comparison tendency mediated the relation between age and PRD. The findings reported in Study 1 were replicated in Study 2 using a sample of participants between the ages of 18 to 30 (n = 180) and 60+ years old (n = 176). Our findings provide evidence that older adults report lower levels of social comparison tendency that, in turn, relate to lower levels of PRD.This research was funded by a grant from the Leverhulme Trust (RPG-2013-148).This is the author accepted manuscript. The final version is available from Elsevier via http://dx.doi.org/10.1016/j.paid.2015.08.00

A Thin Slice of Science Communication: Are People’s Evaluations of TED Talks Predicted by Superficial Impressions of the Speakers?

First impressions based on physical characteristics and superficial information predict a wide variety of social judgments and outcomes. We build on recent work examining the effects of such impressions on the communication of scientific research and ideas to the general public. A large diverse sample viewed and evaluated scientific TED talks, while a separate group viewed short, silent excerpts of each video and judged the speakers on three core sociocognitive traits: competence, morality, and sociability. Neither the perceived scientific quality nor the entertainment value of the talks was meaningfully predicted by the thin-slice judgments; likewise, they were independent of the speakers’ age, gender, ethnicity, and attractiveness. We propose that these null results arise because the influence of superficial visual cues was overwhelmed by the wealth of more diagnostic information and by our participants’ attentiveness to this information. Our results suggest limits to the predictive power of superficial impressions. </jats:p

Having less, giving less: The effects of unfavorable social comparisons of affluence on people’s willingness to act for the benefit of others

Previous research has found a negative relationship between individual differences in personal relative deprivation (i.e., resentment stemming from the belief that one is worse off than similar others) and prosociality. Whether personal relative deprivation causes reductions in people’s willingness to act for the benefit of others, however, is yet to be established. Across six studies, we experimentally examined whether experiences of personal relative deprivation via unfavourable (vs. favourable or lateral) social comparisons of affluence reduced prosociality towards known others and strangers. We found that making hypothetical (Study 1) or real (Study 2) unfavourable social comparisons of affluence in workplace contexts reduced participants’ organisational citizenship behavioural intentions. Furthermore, adverse social comparisons of affluence reduced generosity towards the targets of those comparisons during a Dictator Game (Studies 3 to 6). Across studies we also measured participants’ subjective and objective socioeconomic status and found, contrary to previous theory and research, no consistent relationship between status and prosociality, and no modulation of this relationship by either local or macro-level inequality. These results suggest that local, specific interpersonal comparisons of affluence play a more dominant role in people’s willingness to act for the benefit of a comparison target than do their subjective or objective class rank or the prevailing income inequality of the state in which they reside

How Much Does Effortful Thinking Underlie Observers’ Reactions to Victimization?

From blaming to helping innocent victims, just-world research has revealed that observers react to victimization in a variety of ways. Recent research suggests that such responses to victimization require effortful thought, whereas other research has shown that people can react to these situations intuitively. Along with manipulating just-world threat, across seven experiments, we manipulated or measured participants’ level of mental processing before assessing judgments of victim derogation, blame, willingness to help, and ultimate justice reasoning. The effect of just-world threat on these responses held constant over a range of manipulations/measures, suggesting that the processes involved in maintaining a belief in a just world are not restricted to the rational, deliberative level of mental processing but also occur intuitively

Black hole microstate geometries from string amplitudes

In this talk we review recent calculations of the asymptotic supergravity fields sourced by bound states of D1 and D5-branes carrying travelling waves. We compute disk one-point functions for the massless closed string fields. At large distances from the branes, the effective open string coupling is small, even in the regime of parameters where the classical D1-D5-P black hole may be considered. The fields sourced by the branes differ from the black hole solution by various multipole moments, and have led to the construction of a new 1/8-BPS ansatz in type IIB supergravity.Comment: 14 pages, 3 figures, Contribution to the proceedings of the Black Objects in Supergravity School, Frascati, 201

Selective exposure to deserved outcomes

Research has shown that people often reinterpret their experiences of others' harm and suffering to maintain the functional belief that people get what they deserve (e.g., by blaming the victim). Rather than focusing on such reactive responses to harm and suffering, across 7 studies we examined whether people selectively and proactively choose to be exposed to information about deserved rather than undeserved outcomes. We consistently found that participants selectively chose to learn that bad (good) things happened to bad (good) people (Studies 1 to 7)—that is, they selectively exposed themselves to deserved outcomes. This effect was mediated by the perceived deservingness of outcomes (Studies 2 and 3), and was reduced when participants learned that wrongdoers otherwise received “just deserts” for their transgressions (Study 7). Participants were not simply selectively avoiding information about undeserved outcomes but actively sought information about deserved outcomes (Studies 3 and 4), and participants invested effort in this pattern of selective exposure, seeking out information about deserved outcomes even when it was more time-consuming to find than undeserved outcomes (Studies 5 and 6). Taken together, these findings cast light on a more proactive, anticipatory means by which people maintain a commitment to deservingness

The aa-theorem and the Asymptotics of 4D Quantum Field Theory

We study the possible IR and UV asymptotics of 4D Lorentz invariant unitary quantum field theory. Our main tool is a generalization of the Komargodski-Schwimmer proof for the $a$-theorem. We use this to rule out a large class of renormalization group flows that do not asymptote to conformal field theories in the UV and IR. We show that if the IR (UV) asymptotics is described by perturbation theory, all beta functions must vanish faster than $(1/|\ln\mu|)^{1/2}$ as $\mu \to 0$ ($\mu \to \infty$). This implies that the only possible asymptotics within perturbation theory is conformal field theory. In particular, it rules out perturbative theories with scale but not conformal invariance, which are equivalent to theories with renormalization group pseudocycles. Our arguments hold even for theories with gravitational anomalies. We also give a non-perturbative argument that excludes theories with scale but not conformal invariance. This argument holds for theories in which the stress-energy tensor is sufficiently nontrivial in a technical sense that we make precise.Comment: 41 pages, 2 figures. v2: Arguments clarified, some side comments corrected, connection to previous work by Jack and Osborn described, conclusions unaffecte