Attributions of causality and reactions to uncontrollable outcomes

The experiment tested the hypothesis that the stress experienced by a person who is unable to control aversive stimulation is not a function of lack of control per se, but of the attribution of causality that (s)he makes for failure to exert control. Subjects were given a problem-solving task, and were told that they could prevent aversive noise bursts by correctly solving the problems. Subjects then received false feedback that they had done either well or poorly on the problems. In addition, failing subjects received information that led them to attribute their performance either to their own lack of ability or to situational factors (task difficulty). Subjects who attributed their failure to their own incompetence felt considerably more stress than subjects who made situational attributions. In fact, the latter subjects experienced no more stress than subjects who were successful in controlling the stimulation. Surprisingly, subjects whose attributions for performance led them to feel personally incompetent performed better than the remaining subjects both on problems administered in the same situation, and on problems administered in a new and different situation. The implications of the results for future helplessness studies and for the learned helplessness model were discussed.     

Forgetting and conditioned suppression: role of a temporal discrimination

Several experiments have found complete retention of conditioned suppression when overall suppression to the signal for shock was measured. The present experiment examined retention of conditioned suppression but did so with a paradigm that produced temporal discrimination of shock occurrence. Nine rats were exposed to a flashing light signal of 5-min duration that always terminated with a shock. After several months, a temporal discrimination was well established, as shown by maximum suppression toward the end of the signal period. After remaining in the home cage for 25 days, the rats were again subjected to the conditioning procedure. The overall level of suppression remained the same but the temporal discrimination was not observed.     

Success estimations and performance in children as influenced by age,gender, and task

This study examined the effects of a manipulated sex association cue on the estimation of success as well as actual performance on a novel motor task. Boys and girls in the third and seventh grade (N=80) were randomly assigned by gender and grade to either a football-related or a dance-related group. The task was a simple reaction time test that was presented with instructions to indicate a sex association. Findings indicated that performance expectancies obtained prior to engaging in a novel motor task can be affected by the way a task is presented.     

A complementary—Empowering model of ministerial leadership

Conclusion In conclusion, we suggest that both contemporary leadership effectiveness theory and a Biblical view of leadership empowering point to what we have called a complementary-empowering model of ministerial leadership. The varying levels of maturity to be found in any congregation require an adaptable leadership style that addresses each member of the congregation at his/her level of maturity and empowers that person for ministry and leadership in the church and community. The skills needed to lead persons at each of the maturity levels are not always given to every minister, thus the complementarity of the Body of Christ provides a variety of gifted leaders who together can empower believers for lives of service to the Body and ministry in the community.     

Talking lions and lion talk: Davidson on conceptual schemes

This essay is a reconstruction and defense of Davidson's argument against the intelligiblity of the notion of conceptual scheme. After presenting a brief clarification of Davidson's argument in On the Very Idea of a Conceptual Scheme, I turn to reconstructing Davidson's argument. Unlike many commentators, and occasionally Davidson, who hold that the motive force of the argument is the Principle of Charity (or the denial of the Third Dogma), I argue that there is a further principle which underlies the argument. This principle I call the Strong Discrimination Principle.But the argument of the paper is not purely exegetical. Not only do I show how the Strong Discrimination Principle meets certain objections to Davidson's argument, but I show how the Principle clarifies the realist position. In particular, I show how a line of argument advanced by Rorty and Putnam against (metaphysical) realism can be rejected.If a lion could talk, we could not understand him.Wittgenstein,Philosophical Investigations I have a host of friends. I am grateful to Michael Zimmerman for taking the time to read a preliminary draft of this paper, and to Carolyn Morillo for her comments on a central issue in the paper. I am also especially grateful to the relentlessly enthusiastic participants in the Current Research Seminar at Tulane. To mention but a few: Robert Berman, Radu Bogdan, Norton Nelkin, Graeme Forbes, Jim Stone, and again, Michael Zimmerman and Carolyn Morillo. If I have forgotten just whose objection precipitated yet another footnote or modification, I hope they will be as forgiving as they were helpful. I am also grateful to a referee for having pointed out the relevance of Akeel Bilgrami's article.     

NONVOCAL LANGUAGE ACQUISITION IN ADOLESCENTS WITH SEVERE PHYSICAL DISABILITIES: BLISSYMBOL VERSUS ICONIC STIMULUS FORMATS

This study compared training in two language systems for three severely handicapped, nonvocal adolescents: the Bliss symbol system and an iconic picture system. Following baseline, training and review trials were implemented using an alternating treatments design. Daily probes were conducted to assess maintenance, stimulus generalization, and response generalization, and data were collected on spontaneous usage of either language system throughout the school day. Results showed that students required approximately four times as many trials to acquire Bliss symbols as iconic pictures, and that students maintained a higher percentage of iconic pictures. Stimulus generalization occurred in both language systems, while the number of correct responses during responses generalization probes was much greater for the iconic system. Finally, students almost always showed more iconic responses than Bliss responses in daily spontaneous usage. These results suggest that an iconic system might be more readily acquired, maintained, and generalized to daily situations. Implications of these findings for the newly verbal person were discussed.     

The role of vibration in the tactual perception of roughness

Katz (1925) has argued that the sense of vibration underlies the tactual perception of roughness. However, Taylor and Lederman (1975) have suggested that vibration serves only to prevent the cessation of mechanoreceptor activity. In an experimental evaluation of these positions, it is shown that, although prior (selective) adaptation of the fingertip strongly affects the perceived magnitude of supraliminal vibrotactile signals, it fails to alter the perceived roughness of metal gratings. The results thus favor the Taylor and Lederman position. The paper also speculates on roughness coding by the mechanoreceptor populations present in glabrous skin of the human hand.     

Recognition memory in hearing-impaired children: A levels-of-processing approach

Eighty-nine hearing-impaired children ranging in age from 6 years to 12 years, 11 months were given a recognition task comprised of items from the Raven Coloured Progressive Matrices and the Raven Learning Potential Test following administration of the Raven Coloured Progressive Matrices. The study was designed to determine whether recognition memory varied as a function of item type. The analysis indicated that performance on items involving analogous reasoning exceeded recognition for items requiring pattern completion through closure, which, in turn, exceeded performance for items involving simple pattern completion. Results are discussed in light of levels-of-processing.