A probabilistic model of theory formation

Concept learning is challenging in part because the meanings of many concepts depend on their relationships to other concepts. Learning these concepts in isolation can be difficult, but we present a model that discovers entire systems of related concepts. These systems can be viewed as simple theories that specify the concepts that exist in a domain, and the laws or principles that relate these concepts. We apply our model to several real-world problems, including learning the structure of kinship systems and learning ontologies. We also compare its predictions to data collected in two behavioral experiments. Experiment 1 shows that our model helps to explain how simple theories are acquired and used for inductive inference. Experiment 2 suggests that our model provides a better account of theory discovery than a more traditional alternative that focuses on features rather than relations.     

Making Meaning of Trauma: Trauma Exposure Doesn’t Tell the Whole Story

Although traumatic experiences are relatively common, there is wide variability in individuals’ responses to them. This study examined trauma exposure, meaning making efforts (indexed by post-traumatic cognitions), and post-traumatic stress symptoms (PTS) in a non-clinical volunteer student sample (N = 631). We further examined the moderating role of gender, the importance of trauma type (interpersonal vs. non-interpersonal), and the impact of cumulative traumatic experiences. About 75% of the sample reported past trauma (n = 475). Women reported more interpersonal trauma than did men. For both genders, trauma exposure was associated with more PTS. A dose–response relationship was found between the extent of trauma exposure and negative post-traumatic cognitions. Importantly, post-traumatic cognitions predicted PTS controlling for amount of trauma exposure. It appears that it is not merely exposure to negative events that matters, but how we construe and make sense of these experiences. This study extends our understanding of gender differences, meaning-making, and responses to trauma exposure, and suggests avenues of clinical treatment.     

When animals attack: The effects of mortality salience, infrahumanization of violence, and authoritarianism on support for war

Terror management theory (TMT) suggests that people are motivated to elevate themselves above other animals as a way of denying their creatureliness and mortality. Based on this reasoning, the present study assessed whether infrahumanizing violence by emphasizing its similarities to animal aggression would lead to reduced support for war, especially when mortality is salient. This hypothesis was supported among participants high in right-wing authoritarianism (RWA), who are especially prone to infrahumanize outgroup members and are generally more supportive of military action against outgroups. RWA was associated with greater support for war against Iran, except when primed with thoughts of death and violence as an infrahuman behavior. These data suggest that by portraying violence as something instinctual and creaturely, it may be possible to reduce inter-group hostility and aggression among individuals who tend to be more dispositionally aggressive, particularly in the context of the death awareness that often exacerbates inter-group conflict.     

Multiplex Conflict: Examining the Effects of Overlapping Task and Relationship Conflict on Advice Seeking in Organizations

This study examines the extent to which multiplex conflict relationships, or those infused with both relationship and task conflict, are related to employee decisions regarding from whom to seek advice at work. Data were gathered from 75 employees in a medium-sized life sciences firm in the US Midwest and analyzed using social network analysis. Findings demonstrate that although employees were less likely to seek advice from someone with whom they experienced relationship conflict, employees were more likely to seek advice from those with whom they experienced task conflict. Moreover, advice was still sought from those with whom both forms of conflict were present simultaneously. The current study demonstrates that employees are willing to seek advice from those with whom there is task conflict despite the simultaneous presence of relationship conflict. Compared to relationships free of relationship conflict (e.g., friendships), those characterized by multiplex conflicts provide greater access to others with divergent perspectives while also reducing the need for advice seekers to invest resources towards the protection and maintenance of the positive affective portion of the relationship. Although much of the focus of conflict research has been directed towards intragroup task and relationship conflict, our multiplex social network approach provides a unique opportunity to explore the effects on advice seeking stemming from the co-occurrence of these distinct types of conflict within the same employee dyad. In doing so, we contribute to the continuing debate regarding the primacy of affective or cognitive concerns in judgment and behavior.     

Scaling Up the Self,Scaling Down the World: Self-objectification and the Politics of Carbon Offsets and Personalised Genomics

Two global initiatives, the Genographic Project and the Carbon Lottery, share an ambition to make abstract, global processes—human evolution and climate change—comprehensible and engaging to non-specialists. Despite their differences, they both do so by means of self-objectifications that scale up the selves of participants and scale down complex, spatio-temporal models of human–world relations. The author’s auto-ethnographic experiences in both initiatives illustrate how carbon calculators and personalised genomics involve a pragmatics of scale that evaluates and compares users on the basis of their relative expression of, or deviation from, a standard. Furthermore, this is not based on actual resources that participants do or do not possess, but on forms of capitalist exchange that underwrite carbon trading and population genomics, as experts and corporations make intellectual property derived from purportedly rare DNA and sustainable practices, which are typically indigenous and non-western. In fact, the global inequalities that make possible transactions in carbon offsets and genetic ancestry are obscured from view. As a result, though initiatives like the Genographic Project and Carbon Lottery may provide comprehensible self-objectifications, they potentially make the world more unequal in the process.     

The sound-board account of reasoning: A one-system alternative to dual-process theory

In order to explain the effects found in the heuristics and biases literature, dual-process theories of reasoning claim that human reasoning is of two kinds: Type-1 processing is fast, automatic, and associative, while Type-2 reasoning is slow, controlled, and rule based. If human reasoning is so divided, it would have important consequences for morality, epistemology, and philosophy of mind. Although dual-process theorists have typically argued for their position by way of an inference to the best explanation, they have generally failed to consider alternative hypotheses. Worse still, it is unclear how we might test dual-process theories. In this article, I offer a one-system theory, which I call the Sound-Board Account of Reasoning, according to which there is one reasoning system which is flexible, allowing the properties used to distinguished Type-1 and Type-2 reasoning to cross-cut one another. I empirically distinguish my theory from the two dominant versions of dual-process theory (parallel-competitive and default-interventionist dual-process theory) and argue that my theory’s predictions are confirmed over both of these versions of dual-process theory.     

Parafoveal letter-position coding in reading

The masked-priming lexical decision task has been the paradigm of choice for investigating how readers code for letter identity and position. Insight into the temporal integration of information between prime and target words has pointed out, among other things, that readers do not code for the absolute position of letters. This conception has spurred various accounts of the word recognition process, but the results at present do not favor one account in particular. Thus, employing a new strategy, the present study moves out of the arena of temporal- and into the arena of spatial information integration. We present two lexical decision experiments that tested how the processing of six-letter target words is influenced by simultaneously presented flanking stimuli (each stimulus was presented for 150 ms). We manipulated the orthographic relatedness between the targets and flankers, in terms of both letter identity (same/different letters based on the target’s outer/inner letters) and letter position (intact/reversed order of letters and of flankers, contiguous/noncontiguous flankers). Target processing was strongly facilitated by same-letter flankers, and this facilitatory effect was modulated by both letter/flanker order and contiguity. However, when the flankers consisted of the target’s inner-positioned letters alone, letter order no longer mattered. These findings suggest that readers may code for the relative position of letters using words’ edges as spatial points of reference. We conclude that the flanker paradigm provides a fruitful means to investigate letter-position coding in the fovea and parafovea.