A metacompleteness theorem for contraction-free relevant logics

I note that the logics of the relevant group most closely tied to the research programme in paraconsistency are those without the contraction postulate(A.AB).AB and its close relatives. As a move towards gaining control of the contraction-free systems I show that they are prime (that wheneverA B is a theorem so is eitherA orB). The proof is an extension of the metavaluational techniques standardly used for analogous results about intuitionist logic or the relevant positive logics.The main results of this paper were presented at the Paraconsistent Logic conference in Canberra in 1980. The author wishes to thank the participants in that conference for comments and suggestions made at the time.     

The Augustinian methodological family of psychology

In his Investigations, Wittgenstein employed a quotation from Augustine to capture certain of the essential features of an incoherent conception of language that he believed was at root of many of the dominant theories of meaning of his day. It is argued in the current paper that this very same Augustinian conception of language (ACL) is the foundation of some of the most influential methodological orientations of present-day psychological science, and, as a result, these orientations suffer from a range of ACL-induced incoherences. This thesis is illustrated by way of a case study drawn from the construct validation literature.     

Perfectionists: Study of a Criterion Group

The literature on perfectionism was reviewed and was found to be primarily based on a biased sample of perfectionists in treatment and a negative perception of perfectionism related to common definitions. This negative set also influenced the empirical attempts to measure the construct. Based on these conclusions, the present study was designed to examine perfectionism by locating and interviewing a sample of participants who either considered themselves to be perfectionists or were considered to be perfectionists by others who knew them well. Results are presented and discussed along with suggestions for further research and the implications for counseling.     

An investigation of two measures of career indecision

The present study compared two recent scales developed to measure career indecision, the Career Decision Scale and the Vocational Decision-Making Difficulty Scale. The subjects were 857 male and female undergraduates. The scales were factor analyzed, the total scores were correlated, and the factor structures were examined for similarities and differences. Test-retest correlations were performed on the items, the total scores, and the factor scores of both measures. Subjects who were satisfied with their career choices were compared with subjects who were unsure, dissatisfied, or undecided about their career choices using the items, total scores, and factor scores. The results are discussed along with the implications for the future development of the scales.     

Conceptions of perfectionism and interpersonal problems: evaluating groups using the structural summary method for circumplex data

This study examined two conceptions of perfectionism in relation to interpersonal problems. Two hundred and seventy-nine undergraduate participants completed the Almost Perfect Scale-Revised (APS-R) and the Dyadic Almost Perfect Scale (DAPS). The authors used empirically derived discriminant functions (APS-R) and cluster analysis (DAPS) to identify three groups for both measures: adaptive and maladaptive perfectionists and nonperfectionists. Analyses of group profiles were performed on the Inventory of Interpersonal Problems Circumplex (IIP-C) scales using the structural summary method for circumplex data. APS-R and DAPS groups were compared on interpersonal problems endorsement and IIP-C profile characteristics. For both measures, results supported the hypotheses that maladaptive perfectionists would exhibit elevated profiles reflecting hostile-dominant and friendly-submissive interpersonal problems, whereas the adaptive perfectionists would exhibit low profile elevation indicative of interpersonal adjustment. Overall, results supported Slaney and colleagues' (2001) model of perfectionism and provided evidence for the validity of the APS-R and DAPS.     

What’s in a name? Psychology’s ever evasive construct

We explore in broad terms the uses of the construct concept in psychological and related scientific discourses. First, we provide a brief history of the origins and development of the concept ‘construct.’ We then describe past and current definitions and/or uses of ‘construct’ and attempt to draw out certain conceptual implications of these uses. Finally, we highlight and attempt to clarify several core conceptual confusions that surround the use of ‘construct’ in psychology.     

The One-Variable Fragment of T→

We show that there are infinitely many pairwise non-equivalent formulae in one propositional variable p in the pure implication fragment of the logic T of “ticket entailment” proposed by Anderson and Belnap. This answers a question posed by R. K. Meyer.     

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.