The Undecidability of Iterated Modal Relativization

In dynamic epistemic logic and other fields, it is natural to consider relativization as an operator taking sentences to sentences. When using the ideas and methods of dynamic logic, one would like to iterate operators. This leads to iterated relativization. We are also concerned with the transitive closure operation, due to its connection to common knowledge. We show that for three fragments of the logic of iterated relativization and transitive closure, the satisfiability problems are fi1 ¹₁–complete. Two of these fragments do not include transitive closure. We also show that the question of whether a sentence in these fragments has a finite (tree) model is fi0 ⁰₁–complete. These results go via reduction to problems concerning domino systems.     

Contextual Competence: Multiple Manifestations Among Urban Adolescents

The authors develop and validate multidimensional and contextual profiles of competence among low-income, urban, middle adolescents (N = 560). The assessment of contextual competence was based on youth self-reports of involvement, performance, and relationship quality in the peer, school, athletic, employment, religious, and cultural contexts. A principal components analysis of these engagement indices revealed the six expected components with the addition of a component labeled self-in-context. To identify holistic, multidimensional profiles of contextual competence, scores along the seven domains were cluster analyzed. Nine clusters emerged, each representing a distinct constellation of youth experience. Profiles were associated with demographic variables and youth adjustment. Profiles reflecting high engagement in two or more contexts predicted higher self-esteem and lower depression. In contrast, profiles marked by high engagement in the contexts of athletics or employment predicted more serious delinquency. The authors discuss the implications of these findings for future research and intervention.     

Predicting the Stability of Conduct Problems in Children with and Without Callous-Unemotional Traits

We tested predictors of persistence in conduct problems for children with and without callous-unemotional (CU) traits. Participants were 79 children of an original 98 children recruited from a community-wide screening to oversample children with conduct problems and to ensure equal numbers of children high and low on CU traits. The sample was reassessed at four yearly intervals and the 79 children (81%) were those with data at all four assessments. Children within each conduct problem group were divided into those with more and less stable patterns of conduct problems based on structured interviews with parent and child. Stability in conduct problems for children without CU traits was more strongly related to level of impulsivity and socioeconomic status, whereas children high on CU traits showed more stable conduct problems if they experienced higher rates of life stressors.     

Selflessness &; Cognition

What are the cognitive mechanisms that underlie selfless conduct, both ‘thinking’ and unthinking? We first consider deliberate selflessness, a manner of selecting acts in which, in evaluating options, one expressly chooses not to weigh the potential consequences for oneself (though this formulation is seen as needing some qualification). We then turn to unthinking behavior in general, and whether we are responsible for it, as the foundation for analyzing the unthinking variety of selflessness. Using illustrative cases (Grenade Gallantry, The Well-Meaning Miner, Ignorant Ilya, Self-Disregarding Sally) we explore just what is involved in setting aside one's self-interests unthinkingly. Eventually, this account links up with work on mental compartmentalization, as it becomes apparent that unthinking selflessness encompasses both unthinking behavior (calling upon inexplicit cognitive utilization of stored images) that is selfless, and thinking behavior (calling upon reasoning with sentences) that is unthinkingly selfless (by virtue of an unreasoned, automatic shift of cognitive standpoint to a ‘compartment’ that omits information about one's self-interests). The analysis points toward a practical program for generating increased selflessness in ourselves and others.     

Confronting deep moral disagreement: the President's Council on Bioethics, moral status, and human embryos

The report of the President's Council on Bioethics, Human Cloning and Human Dignity, addresses the central ethical, political, and policy issue in human embryonic stem cell research: the moral status of extracorporeal human embryos. The Council members were in sharp disagreement on this issue and essentially failed to adequately engage and respectfully acknowledge each others' deepest moral concerns, despite their stated commitment to do so. This essay provides a detailed critique of the two extreme views on the Council (i.e., embryos have full moral status or they have none at all) and then gives theoretical grounding for our judgment about the intermediate moral status of embryos. It also supplies an account of how to address profound moral disagreements in the public arena, especially by way of constructing a middle ground that deliberately pays sincere respect to the views of those with whom it has deep disagreements.     

Absolute sensitivity to white noise under auxiliary visual stimulation1

Absolute sensitivity to white noise was measured with the O in the dark, in constant illumination, and in the dark but with sound-synchronized flashes of light at three different intensities. A confidence rating procedure was used, and the results were analyzed in terms of the theory of signal detectability. There appeared to be no consistent effect of auxiliary visual stimulation on absolute auditory sensitivity for the four Os examined.     

A simple procedure for approximate factor analysis

A variation of the centroid method is described and illustrated. By the application of new rules for reflecting signs, it may be possible to reduce to insignificance the factor loadings of tests showing insignificant correlation (original or residual) with clusters of tests having relatively high intercorrelations. As a result, a factor common to any one of these clusters may be revealed by the centroid method itself with little or no need for rotation of axes or further calculations.     

Implementing a differential reinforcement of low rates schedule to alter vocal stereotypy and task engagement in two adolescents with autism spectrum disorder

Vocal stereotypy (VS) is often observed in individuals with autism spectrum disorder (ASD) which at high rates can interfere with socialization or functioning in structured settings. There are multiple effective interventions available; yet, many procedures target the complete omission of the behavior or are only assessed at short intervals, making it unclear how they will generalize in applied settings. One intervention yet to be assessed as an individual intervention for automatically reinforced VS is differential reinforcement of low rates of behavior (DRL). In the present study, a functional analysis determined that the VS of two female adolescents with ASD was maintained by automatic reinforcement. A DRL procedure was implemented which incorporated: (a) a specified interval for reinforcement; (b) the behavioral expectations; (c) the permissible instances of VS within the interval; (d) learner feedback; and (e) the reset/non-reset aspect of the schedule. As the targeted behavior decreased across sessions, the DRL interval was systematically increased in order to thin out the schedule of reinforcement. The intervention reduced VS and increased untargeted task engagement for both participants. Applied and theoretical implications of the study as well as social validity, limitations, and future research are discussed.     

The effects of social vigilantism and masculine honor beliefs on perceptions of confrontation during the COVID-19 pandemic

Varying opinions about the COVID-19 pandemic inspire different behaviors (e.g., mask-wearing), and confrontation may result between people with differing viewpoints. Individual differences associated with belief superiority (e.g., Social Vigilantism; SV) and/or pride (e.g., Masculine Honor Beliefs; MHB) likely related to third-person perceptions of pandemic confrontations. In this study (N = 237; US sample), we used vignettes in a 2 (Mask: Yes/No) ×  2(Confrontation Response: Vocal Defense/Walked Away) between-groups design to examine how SV and MHB predict perceptions of (1) responses to public confrontation about (not) wearing a mask and (2) the person being confronted. In general, mask-wearing and walking away from confrontation were perceived more positively. Higher SV was associated with more positive perceptions of seemingly morally-justified responses to confrontation (e.g., walking away when confronted for not wearing a mask, vocally defending oneself when confronted for wearing a mask). Contrarily, higher MHB were associated with more positive perceptions of non-mask-wearing. This research provides insight about how individual differences in SV and MHB relate to nuances in pandemic confrontations, and responses to confrontations, about (non)mask-wearing.