Nonparametric self-exciting models for computer network traffic

Statistics and Computing - Connectivity patterns between nodes in a computer network can be interpreted and modelled as point processes where events in a process indicate connections being...     

Familiarity effects in nonverbal understanding: Recognizing our own facial expressions and our friends'

In this study we explored how individuals' private expressions are interpreted by the self, same-sex friends, and strangers. Videotapes were made of participants as they watched pleasant, unpleasant, and unusual slides. Approximately a year later, the tapes were shown to the participant, a same-sex friend, another participant, and the other participant's friend. Judges were able to read the facial expressions at levels of accuracy that were significantly greater than chance. They were no better at reading familiar targets (themselves or their friends) than unfamiliar ones (strangers), with only one exception (men were better at recognizing the reactions of familiar targets than unfamiliar targets viewing pleasant slides). In their abilities to understand nonverbal cues, female friends showed resemblances to each other on all accuracy measures (pleasant/unpleasant/unusual X familiar/unfamiliar). Male friends resembled each other only in their understanding of the reactions of unfamiliar men viewing unpleasant slides.This research was supported in part by an NSF grant and an NIMH Research Scientist Development Award to the second author. We thank Charles Frohman and Laura Yamhure for their help with this research.     

A life table for a West Indian slave population

This note comments briefly on the system of slave registration set up in the British colonies, and deals in particular with the data tabulated for the British Guiana slave population in the Parliamentary Papers, 1833. From the age distributions given there a life table has been constructed by a census differencing method. This life table shows the extremely high mortality then being experienced by slave populations in the West Indies.     

Willingness to speak out about gay laws reform: some cause for optimism

We examined the extent to which people's private attitudes to gay law reform are influenced by the attitudes of others. Ninety-six university students were told that they were either in a minority or in a majority relative to their university group on their attitudes to gay law reform. Contrary to a number of assumptions made in the social psychological literature, participants who supported gay law reform were more prepared to act in line with their attitudes than were those who opposed gay law reform. Furthermore, anti-gay law reform participants appeared to reassess their attitudes when they were told they were in a minority; in contrast, pro-gay law reform participants were unaffected by the group norm. This suggests that anti-gay law reform attitudes are softer and more easily influenced than are pro-gay law reform attitudes. The implications of these results for activists are discussed.     

Relational factors in understanding satisfaction in the lasting relationships of same sex and heterosexual couples

Satisfying relationships are important to the well-being of individuals and families. Because of increased longevity, many couples are staying together for extended periods of time. Thus, it is valuable to understand the factors that contribute to a sense of satisfaction among partners in lasting relationships. Relatively little attention has been paid in the research literature to relationships among older couples who have remained together for many years. Even less attention has been paid to the lasting relationships of couples of color and to gay male and lesbian couples. This paper focuses on understanding the factors that contribute to satisfaction of partners in the long-term relationships of a purposive sample of heterosexual and same-sex couples. Data was collected through in-depth interviews with 216 partners in 108 relationships that had lasted an average of 30 years. Using logistic regression analysis, two factors were identified as predictive of satisfaction during the recent years of these relationships: containment of relational conflict and psychologically intimate communication between partners. Based on these findings, a theoretical model for understanding satisfaction in lasting relationships is discussed.     

The Relationship between Economic Development and Social Welfare: A New Adjusted GDP Measure of Welfare

Existing literature focuses on the issue ofpreparation of social welfare measurements onthe basis of an unadjusted Gross DomesticProduct (GDP). This paper extends this methodto incorporate cost-benefit analysis ofeconomic growth in a growing economy incalculating the adjusted GDP, termed as thecost-benefit (CB)-adjusted GDP. This approachis empirically applied to Thailand. There arestark differences between GDP per capita and CBadjusted GDP per capita rates for this period.This paper concludes that GDP can be used as anindicator of social welfare if the GDPestimates are undertaken within a cost-benefitanalysis framework.     

Implicit Valuation of the Near-Miss is Dependent on Outcome Context

Gambling studies have described a “near-miss effect” wherein the experience of almost winning increases gambling persistence. The near-miss has been proposed to inflate the value of preceding actions through its perceptual similarity to wins. We demonstrate here, however, that it acts as a conditioned stimulus to positively or negatively influence valuation, dependent on reward expectation and cognitive engagement. When subjects are asked to choose between two simulated slot machines, near-misses increase valuation of machines with a low payout rate, whereas they decrease valuation of high payout machines. This contextual effect impairs decisions and persists regardless of manipulations to outcome feedback or financial incentive provided for good performance. It is consistent with proposals that near-misses cause frustration when wins are expected, and we propose that it increases choice stochasticity and overrides avoidance of low-valued options. Intriguingly, the near-miss effect disappears when subjects are required to explicitly value machines by placing bets, rather than choosing between them. We propose that this task increases cognitive engagement and recruits participation of brain regions involved in cognitive processing, causing inhibition of otherwise dominant systems of decision-making. Our results reveal that only implicit, rather than explicit strategies of decision-making are affected by near-misses, and that the brain can fluidly shift between these strategies according to task demands.     

Gambling and Sport: Implicit Association and Explicit Intention Among Underage Youth

This study examined whether an implicit association existed between gambling and sport among underage youth in Australia, and whether this implicit association could shape their explicit intention to gamble. A sample of 14–17 year old Australian participants completed two phases of tasks, including an implicit association test based online experiment, and a post-experiment online survey. The results supported the existence of an implicit association between gambling and sport among the participants. This implicit association became stronger when they saw sport-relevant (vs. sport-irrelevant) gambling logos, or gambling-relevant (vs. gambling-irrelevant) sport names. In addition, this implicit association was positively related to the amount of sport viewing, but only among those participants who had more favorable gambling attitudes. Lastly, gambling attitudes and advertising knowledge, rather than the implicit association, turned out to be significant predictors of the explicit intention to gamble.     

“With Whom no White Scholar can Compare”: Academic Interpretations of the Relationship between W.E.B. Du Bois and Max Weber

Max Weber (1864–1920) is considered one of the canonical founders of sociology, while W. E. B. Du Bois (1868–1963), author of The Philadelphia Negro (1899), The Souls of Black Folk (1903), and Black Reconstruction (1935), has only recently been included in the sociological canon. We provide a historical review of what we know of their relationship in order to first ask, what did Du Bois say about Weber, and second, what did Weber say about Du Bois? We then analyze the extant scholarly discourse of published English-language academic journal articles that substantively mention both Weber and Du Bois in order to address a third question: what did other scholars say about their relationship? We provide an analysis of the variation of scholars’ perceptions on the relationship between Du Bois and Weber to illumine the dominant assumptions about founding figures and the origin story of American sociology writ large. We argue that three mechanisms of white group interests configured the marginalization of Du Bois from both mainstream and sub-disciplinary sociological theory: (1) reduction or “knowing that we do no know and not caring to know” (when knowledge is perceived as irrelevant to white group interests), (2) deportation or “not wanting to know” (when knowledge is systematically exiled), and (3) appropriation or “not knowing that we do not know”) (when dominant knowledge usurps or assimilates challenges to that knowledge).