Completeness of Certain Bimodal Logics for Subset Spaces

Subset Spaces were introduced by L. Moss and R. Parikh in [8]. These spaces model the reasoning about knowledge of changing states.In [2] a kind of subset space called intersection space was considered and the question about the existence of a set of axioms that is complete for the logic of intersection spaces was addressed. In [9] the first author introduced the class of directed spaces and proved that any set of axioms for directed frames also characterizes intersection spaces.We give here a complete axiomatization for directed spaces. We also show that it is not possible to reduce this set of axioms to a finite set.     

Achievement goal orientations and motivational outcomes in youth sport: The role of social orientations

ObjectivesSocial goal orientations, which reflect ways of conceptualizing competence in terms of social relationships with others, have been researched minimally in the physical domain. While the relationship between task and ego orientations and motivational outcomes has been well-studied, the link of friendship, group acceptance, and coach praise orientations with enjoyment, perceived physical competence, and intrinsic motivation warrants further study.MethodMale and female middle-school students (N = 303) completed questionnaires assessing task, ego, coach praise, friendship, and group acceptance orientations; enjoyment; perceived physical competence; and motivation. Two approaches to data analysis (variable-centered, person-centered) examined whether social orientations were significantly related to motivational outcomes among adolescents.ResultsVariable-centered analysis (i.e., canonical correlation) showed that social orientations were related to enjoyment, perceived physical competence, and intrinsic motivation. Person-centered analyses (i.e., cluster analysis, MANOVA) classified participants with similar patterns of goal orientations and then compared the emergent groups on motivational outcomes. Participants who defined success using either higher task, ego, and social goal orientations or higher friendship and lower ego orientations reported the most adaptive responses (higher perceived competence, enjoyment, and intrinsic motivation).ConclusionsSocial orientations in sport are important to consider alongside task and ego orientations in research stemming from achievement goal theory. Defining success or competence in terms of social relationships can have positive motivational benefits in sport.     

Nominal analysis of “variance”

Nominal responses are the natural way for people to report actions or opinions. Because nominal responses do not generate numerical data, they have been underutilized in behavioral research. On those occasions in which nominal responses are elicited, the responses are customarily aggregated over people or trials so that large-sample statistics can be employed. A new analysis is proposed that directly associates differences among responses with particular sources in factorial designs. A pair of nominal responses either matches or does not; when responses do not match, they vary. That analogue to variance is incorporated in the nominal analysis of “variance” (Nanova ) procedure, wherein the proportions of matches associated with sources play the same role as do sums of squares in an anova . The Nanova table is structured like an ANOVA table. The significance levels of the N ratios formed by comparing proportions are determined by resampling. Fictitious behavioral examples featuring independent groups and repeated measures designs are presented. A Windows program for the analysis is available.     

Understanding optimal outcomes.

Using a simulated employment contract negotiation, this study examined the relationship between negotiation strategies and the quality of negotiated outcomes. A log‐linear analysis showed that the frequency and sequencing of strategies was systematically related to negotiation outcomes. Impasse negotiations were characterized by the frequent use of contention and sequences that paired similar (either cooperative or competitive) strategies. Settlement was associated with decreased contention and the use of sequences that paired dissimilar strategies. Increasing joint gain was linked to the introduction of priority information and conciliation as well as to changes in the pattern of information exchange: Reciprocal and indirect (positional) information exchange led to low joint gain, whereas reciprocal and direct (priority) information exchange led to high joint gain.     

Process and content in a long-term PTSD therapy group for Vietnam veterans

Process and content were studied in four 16-session segments of a psychodynamically oriented therapy group for Vietnam veterans suffering from posttraumatic stress disorder (PTSD). On the Group Climate Questionnaire (GCQ-S), the group scored significantly higher in the Engaged dimension and significantly lower in the Avoiding and Conflict dimensions than contrasting samples of neurotic and psychotic groups. There was no evidence of group stages. Topics related to symptoms of PTSD were discussed most frequently (43.1%), followed by issues concerning relations with others (32.4%),general group therapy issues (13.7%), and other topics (10.8%). Clinical implications of these findings are discussed.The authors thank Tom Metzler, M.A., and Heidi Ronfeldt, B.S., for their assistance with the data analysis.Parts of this paper were presented at the American Group Psychotherapy Association Annual Meeting, February 15–20, 1993, San Diego, CA.     

Inflection,frequency, and the word superiority effect

Summary It has been known for nearly 100 years that single words presented tachistoscopically are better recognized than arbitrary letter strings. The present experiments investigate the impact of the morphological structure of words and of word frequency on the word superiority effect. It has been shown that inflected word forms show higher reaction time and error scores in the lexical decision task and higher error scores in the Reicher-Wheeler paradigm. Word frequency also determines lexical decision time. However, no frequency effect in the Reicher-Wheeler paradigm could be found. The results are discussed in the framework of McClelland and Rumelhart's (1981) model of context effects in letter search.This paper is mainly (Experiments I and III) based on the first author's Habilitationsschrift from October, 1982 (cf. Günther 1983a).