On the Ternary Relation and Conditionality

One of the most dominant approaches to semantics for relevant (and many paraconsistent) logics is the Routley?CMeyer semantics involving a ternary relation on points. To some (many?), this ternary relation has seemed like a technical trick devoid of an intuitively appealing philosophical story that connects it up with conditionality in general. In this paper, we respond to this worry by providing three different philosophical accounts of the ternary relation that correspond to three conceptions of conditionality. We close by briefly discussing a general conception of conditionality that may unify the three given conceptions.     

Neurobiological correlates of cognitions in fear and anxiety: a cognitive-neurobiological information-processing model

We review likely neurobiological substrates of cognitions related to fear and anxiety. Cognitive processes are linked to abnormal early activity reflecting hypervigilance in subcortical networks involving the amygdala, hippocampus, and insular cortex, and later recruitment of cortical regulatory resources, including activation of the anterior cingulate cortex and prefrontal cortex to implement avoidant response strategies. Based on this evidence, we present a cognitive-neurobiological information-processing model of fear and anxiety, linking distinct brain structures to specific stages of information processing of perceived threat.     

Wishing for Change in Japan and Canada

Japanese and Canadian university students were compared on the changes they wanted in their lives. Contrary to their characterization as self-effacingly relational and group-minded, Japanese were no more likely than Canadians to wish for social or collective goods. Rather, Japanese were more likely than Canadians to wish for money or material goods, and less likely than Canadians to wish for better family relations, increased self-understanding, and improved academic performance. Whether these findings reflect dissimilar cultural priorities, unequal opportunities and constraints, or both, is discussed.     

EFFECTS OF ETHNICITY,ACCENT, AND JOB STATUS ON SELECTION DECISIONS

The present study investigated the effects of ethnicity, accent, and job status in the selection interview. Two hundred and ten student subjects viewed simulated, videotaped selection interviews in which applicant ethnicity, applicant accent, and job status were manipulated in a completely crossed 3 × 2 × 2 factorial design. Two sets of ratings were obtained, selection decision ratings of the job applicant, and subjective importance ratings based on the previous selection decisions. Significant main effects were obtained for ethnicity and job status in selection decision as predicted. Contrary to predictions however, the main effect for accent was not found significant. Further analysis of the importance ratings indicated a significant main effect for accent, but not for ethnicity. These findings indicated that applicant ethnicity and job status were important in selection interview decision and accent was not. Contrary to this however, subjects considered that accent was important in their selection decision ratings, while ethnicity was not.     

Is Androgynous Sex Role Related to Cigarette Smoking in Adolescents?1

The initiation of potentially health-threatening behaviors by adolescents, despite their realization of the dangers of such behavior, has been attributed to various social influences (e.g., peer pressure). It appears that some adolescents may be more likely to resist such influences than others. The present exploratory investigation tests the hypothesis that adolescents characterized as androgynous in “sex role” terms would be less vulnerable to social influences to engage in one such health-threatening behavior, smoking. Within a sample of seventh graders (n= 3,317), sex role identity was measured by relevant items from the Personal Attributes Questionnaire (PAQ) as was frequency of cigarette smoking. Results indicate that “androgynous” subjects, as hypothesized, may smoke less than those characterized by other sex roles. Results are discussed in the context of our recommendations for more comprehensive testing of the relation between sex role and smoking.     

Rhythm and the timing of movement sequences

Summary Many motor skills involve a sequence of movements phased over a period of time. The present study investigated the importance of rhythmic timing structures in the acquisition and control of a serial key-pressing task. Four groups of subjects received extensive practice on 9-element finger sequences varying in the form of the inherent temporal structure. Following a training period, the stability of the various timing patterns was examined by requiring subjects to perform the key-pressing task concurrently with a verbal memory task. The memory task involved reporting back a sequence of visually-presented words with a lag of one word. A comparison was made of performance on the two tasks under dual task and control (single task) conditions. The results suggested that natural rhythmic timing structures require less attention for production than unnatural temporal patterns. A breakdown of the temporal patterns into within-group and between-group intervals showed that patterns containing within-group intervals that related as 1:1 or 1:2 evidenced good stability under dual-task conditions. These results were taken as support for the suggestion by Fraisse (1946) that the perception and production of rhythms can be understood by an internal representation that allows only two distinct durations that relate as 1:2. Furthermore, it was suggested that relative timing may become an invariant property of motor program representation only in those instances in which the timing sequence completely fits the internal timing structure.     

Conceptual differentiation, integration and empathic prediction

Several investigators have examined the relationship of a rater's cognitive complexity to accurate empathic prediction of a target's self-concept or behavior, with mixed results. The present study sought to clarify this relation by considering both the conceptual differentiation (functionally independent construction) and integration (ordination) of both rater and target as they bear on predictive accuracy at early and later stages of acquaintance. Two sets of ten subjects participated in weekly self-disclosure groups, and attempted to predict one another's self-ratings on personal constructs after four and eighteen weeks of structured dyadic interaction. Results suggested that (a) the conceptual structure of the rater was unrelated to predictive accuracy, (b) high differentiated/low integrated targets were less accurately predicted at Time 1, (c) raters generally became more accurate predictors over time, and (d) conceptual structure was related to predictive accuracy at early, but not advanced stages of relationship. These findings were interpreted within an expanded theoretical framework emphasizing the multidimensional assessment of cognitive complexity as well as the stage of acquaintance at which social prediction takes place.     

Ontology-free modal semantics

The problem with model-theoretic modal semantics is that it provides only the formal beginnings of an account of the semantics of modal languages. In the case of non-modal language, we bridge the gap between semantics and mere model theory, by claiming that a sentence is true just in case it is true in an intended model. Truth in a model is given by the model theory, and an intended model is a model which has as domain the actual objects of discourse, and which relates these objects in an appropriate manner. However, the same strategy applied to the modal case seems to require an intended modal model whose domain includes mere possibilia.Building on recent work by Christopher Menzel (Nous 1990), I give an account of model-theoretic semantics for modal languages which does not require mere possibilia or intensional entities of any kind. Menzel has offered a representational account of model-theoretic modal semantics that accords with actualist scruples, since it does not require possibilia. However, Menzel's view is in the company of other actualists who seek to eliminate possible worlds, but whose accounts tolerate other sorts of abstract, intensional entities, such as possible states of affairs. Menzel's account crucially depends on the existence of properties and relations in intension.I offer a purely extensional, representational account and prove that it does all the work that Menzel's account does. The result of this endeavor is an account of model-theoretic semantics for modal languages requiring nothing but pure sets and the actual objects of discourse. Since ontologically beyond what is prima facie presupposed by the model theory itself. Thus, the result is truly an ontology-free model-theoretic semantics for modal languages. That is to say, getting genuine modal semantics out of the model theory is ontologically cost-free. Since my extensional account is demonstrably no less adeguate, and yet is at the same time more ontologically frugal, it is certainly to be preferred.Special thanks to Brian Chellas, Charles Chihara, Harry Deutsch, Bernard Linsky, Kirk Ludwig, Christopher Menzel and Gila Sher for helpful discussion. My thanks also to an anonymous referee for this Journal for kind words and attention to detail. Portions of this paper were presented at the 1993 meeting of the Society for Exact Philosophy in Toronto, and at the 1994 conference of the Association for Symbolic Logic in Gainesville, Florida. Thanks to all who attended those sessions.     

Displaying and Deciding Substructural Logics 1: Logics with Contraposition

Many logics in the relevant family can be given a proof theory in the style of Belnap's display logic (Belnap, 1982). However, as originally given, the proof theory is essentially more expressive than the logics they seek to model. In this paper, we consider a modified proof theory which more closely models relevant logics. In addition, we use this proof theory to show decidability for a large range of substructural logics.