Grouping puts figure-ground assignment in context by constraining propagation of edge assignment

Figure-ground organization involves the assignment of edges to a figural shape on one or the other side of each dividing edge. Established visual cues for edge assignment primarily concern relatively local rather than contextual factors. In the present article, we show that an assignment for a locally unbiased edge can be affected by an assignment of a remote contextual edge that has its own locally biased assignment. We find that such propagation of edge assignment from the biased remote context occurs only when the biased and unbiased edges are grouped. This new principle, whereby grouping constrains the propagation of figural edge assignment, emerges from both subjective reports and an objective short-term edge-matching task. It generalizes from moving displays involving grouping by common fate and collinearity, to static displays with grouping by similarity of edge-contrast polarity, or apparent occlusion. Our results identify a new contextual influence on edge assignment. They also identify a new mechanistic relation between grouping and figure-ground processes, whereby grouping between remote elements can constrain the propagation of edge assignment between those elements. Supplemental materials for this article may be downloaded from http://app.psychonomic-journals.org/content/supplemental.     

Structuring Ends

There is disagreement among contemporary theorists regarding human well-being. On one hand there are “substantive good” views, according to which the most important elements of a person’s well-being result from her nature as a human, rational, and/or sentient being. On the other hand there are “agent-constituted” views, which contend that a person’s well-being is constituted by her particular aims, desires, and/or preferences. Each approach captures important features of human well-being, but neither can provide a complete account: agent-constituted theories have difficulty accounting for the normativity of their claims, and substantive good theories have difficulty accounting for how a person’s actually adopted aims shape what is good for her and hence what she has reason to do. I articulate and defend a hybrid view that equals these approaches in systematicity and completeness of explanation yet seeks to surpass them in coherence with our ordinary judgments about what human well-being consists in. This hybrid view maintains, with agent-constituted theories, that a person’s well-being is (1) significantly constituted by her actually adopted aims; (2) deeply contingent; (3) agent-relative; (4) significantly dependent on spatially and temporally remote events; and (5) significantly independent of her experiences. The hybrid view also maintains, with substantive good theories, that a person’s well-being is (6) in part determined by facts independent of her aims, desires, and preferences; (7) such that all her aims are subject to critical evaluation and revision; and (8) constituted by her aims only if these aims are choiceworthy.     

Posttraumatic stress disorder's frequency and intensity ratings are associated with factor structure differences in military veterans

We examined possible differences in the factor structure of posttraumatic stress disorder (PTSD) on the basis of whether frequency or intensity symptom response formats were used to assess PTSD. Participants included 669 veterans recruited from an epidemiological study of four Veterans Affairs Medical Centers' primary care clinics in the southeastern United States. Confirmatory factor analysis using measurement invariance testing found that the frequency and intensity symptom formats were significantly different from each other on PTSD's factor structure parameters, including factor loadings, observed variable intercepts, and measurement errors. The only exception was for PTSD's effortful avoidance symptoms, which were associated with equivalent parameter estimates for both the frequency and intensity formats. Implications for the clinical assessment of PTSD and interpretation of the extant literature base on PTSD's factor structure are considered.     

You do not only hurt the one you love: Self-protective responses to attractive relationship alternatives

Committed romantic relationships confer important benefits to psychological health and well-being. However, to effectively maintain these relationships, individuals must avoid threats posed by the temptation of attractive relationship alternatives. Previous work has demonstrated that individuals in committed relationships consciously downplay the allure of romantic alternatives. The current work tested the hypothesis that attractive relationship alternatives evoke an automatic self-protective response at an early stage of cognition. The current study employed a computer simulation that recorded automatic, split-second assessments of threat elicited by social targets that varied in their gender and level of attractiveness. Consistent with hypotheses, attractive opposite-sex targets evoked automatic self-protective responses from participants in committed heterosexual relationships. Moreover, these responses seemed to be particularly pronounced among the male participants in committed relationships. These findings have implications for the maintenance of long-term close relationships.     

Implicit and explicit prejudice in the 2008 American presidential election

The 2008 US presidential election was an unprecedented opportunity to study the role of racial prejudice in political decision making. Although explicitly expressed prejudice has declined dramatically during the last four decades, more subtle implicit forms of prejudice (which come to mind automatically and may influence behavior unintentionally) may still exist. In three surveys of representative samples of American adults, explicit and implicit prejudice were measured during the months preceding the election. Both explicit and implicit prejudice were significant predictors of later vote choice. Citizens higher in explicit prejudice were less likely to vote for Barack Obama and more likely to vote for John McCain. After controlling for explicit prejudice, citizens higher in implicit prejudice were less likely to vote for Obama, but were not more likely to vote for McCain. Instead, they were more likely to either abstain or to vote for a third-party candidate rather than Obama. The results suggest that racial prejudice may continue to influence the voting process even among people who would not endorse these attitudes.     

Manifest Invalidity: Neil Tennant's New Argument for Intuitionism

In Chapter 7 of The Taming of the True, Neil Tennant provides a new argument from Michael Dummett's ``manifestation requirement' to the incorrectness of classical logic and the correctness of intuitionistic logic. I show that Tennant's new argument is only valid if one interprets crucial existence claims occurring in the proof in the manner of intuitionists. If one interprets the existence claims as a classical logician would, then one can accept Tennant's premises while rejecting his conclusion of logical revision. Thus, Tennant has provided no evidence that should convince anyone who is not already an intuitionist. Since his proof is a proof for the correctness of intuitionism, it begs the question.     

Empirical Guidance for Time-Window Sequential Analysis of Single Cases

Time-window sequential analyses test whether a target behavior occurs within a temporal window (e.g., within 2 seconds) after an antecedent behavior more than is expected by chance. This type of question is common when we need to know how one person or event may immediately affect another event or person in the natural environment. Theoretically, the significance of sequential associations from time-window analysis can be tested on the single subject level (Bakeman & Quera, 1995). The present Monte Carlo study was conducted to test the Type I error rates and the difference in sequential associations derived from four methods of time-window sequential analysis. The four methods vary according to whether they analyze the duration of antecedent and target behaviors. The results indicate that time-window sequential analysis method is generally valid. The results were most accurate when antecedent duration and target onset was analyzed. Although analyzing duration of the antecedent did affect the results, the effect size for the difference in results due to presence or absence of measuring duration of the antecedent was extremely small. Time-window analysis results appear unaffected by the decision to analyze the duration of the target event.     

Exploring the neurocognitive basis of episodic recollection in autism

Psychonomic Bulletin & Review - Increasing evidence indicates that the subjective experience of recollection is diminished in autism spectrum disorder (ASD) compared to neurotypical...