Determinants of human performance on concurrent schedules.

Six experiments, each with 5 human adults, were conducted to investigate the determinants of human performance on multiple concurrent variable-interval schedules. A two-key procedure was employed in which subjects' key presses produced points exchangeable for money. Variables manipulated across experiments were (a) changeover delay (Experiments 2, 4, and 6), (b) ordinal cues related to scheduled reinforcement frequencies (Experiments 3 and 4), and (c) instructions describing the ordinal relations between schedule-correlated stimuli and scheduled reinforcement frequency (Experiments 5 and 6). The performances of only 13 of the 30 subjects could be described by the generalized matching equation and were within a range of values typical of those reported in the animal literature. Eight subjects showed indifference, 9 undermatched, 7 approximated matching, 3 overmatched, and a further 3 responded exclusively to the richer component of the concurrent schedules. These differing modes of responding were closely related to the different types of performance rules reported by subjects in postexperimental questionnaires. The results are in good agreement with those from studies of human performance on single schedules, suggesting that rule-governed behavior, in interaction with contingencies, may be an important determinant of human choice.     

关于高校多媒体教学影响因素的建模与分析

基于相关认知理论和前人研究结果建立了多媒体教学环境下教师授课、学生学习和学习绩效因素结构模型。采用问卷和量表法获取在杭6所高校的多媒体教学实践数据,验证性因素分析的结果证实了3个假设模型的适宜性和合理性。文章以所建的3个模型为框架,用多媒体学习认知理论和认知负荷理论分析了当前高校多媒体教学状况,并为高校多媒体教学发展提出了相应的心理学建议。     

The Eastern Catholic Churches and the paradox of Vatican II

The author investigates the challenges to Catholic ecclesiology presented by two Eastern Catholic Churches – the Ukrainian Greek Catholic Church and the Melkite Greek Catholic Church – as they assert prerogatives validated by the teachings of Vatican II. In their reception of the Council these Churches highlight the need to develop the Trinitarian and Eucharistic ecclesiology rediscovered by the Council. This practical development is mirrored in the progress of the International Roman Catholic–Orthodox Dialogue and the teachings of Pope John Paul II. Although a final resolution still awaits, it is evident in the treatment of the Eastern Catholics by the Vatican that reception of the Council demands a renewed understanding of the mutual interdependence of primacy and conciliarity. Such a development will only hasten Christian reunification.     

Missionary Institutes in the wake of the Second Vatican Council: the case of the Missionaries of Africa

It is legitimate to imagine that the Church would have been different had it not been for the courage and insight of Pope John XXIII, who convened the Second Ecumenical Council, completed after him by Pope Paul VI. It initiated extensive reform in the Catholic Church, both in the way she understands herself and as she sees her presence and interaction with the (secular) world. This Ecumenical Council also invited Religious Congregations and Institutes of Consecrated Apostolic Life to engage in a process of renewal (aggiornamento) that would bring them also into line with the new theology of the Second Vatican Council. The Missionaries of Africa, under the leadership of Fr Léo Volker, undertook this thorough renewal before, during and after the 1967 General Chapter. This article explores how aggiornamento changed our Missionary Family and how it impacted on the local churches in Africa which we served.     

Recent Theological Interpretations of Evolution

Abstract

In this article I give special attention to recent responses particularly by Roman Catholic scholars to the question, “How should Christian theology take into serious consideration the scientific theory of biological evolution?” To do this I will explore a number of key areas where recent scholarship has made considerable progress in response to this question and at the same time raised new insights into additional questions.     

Perspective Effects on Recall in a Testimony Paradigm

The two present studies examined the influence of perspective instructions given during encoding and retrieval on the recall of a visual event. Participants viewed slides or a film depicting a day in the life of a man. Before viewing the to-be-remembered event, they were instructed to adopt the perspective of an alcoholic vs. an unemployed man vs. no perspective (Experiment 1), or of an unemployed man vs. no perspective (Experiment 2). Participants in the first study were interviewed twice, with the second recall being preceded by either a change perspective instruction or without any specific instruction. In the second study, participants were interviewed using either a cognitive interview (CI) or a CI without the change perspective instruction. Results showed that adopting a perspective during encoding impaired recall performance and failed to demonstrate a significant benefit of the change perspective instruction. The theoretical and practical implications of these results are discussed.     

Teaching early braille literacy skills within a stimulus equivalence paradigm to children with degenerative visual impairments

Despite the need for braille literacy, there has been little attempt to systematically evaluate braille-instruction programs. The current study evaluated an instructive procedure for teaching early braille-reading skills with 4 school-aged children with degenerative visual impairments. Following a series of pretests, braille instruction involved providing a sample braille letter and teaching the selection of the corresponding printed letter from a comparison array. Concomitant with increases in the accuracy of this skill, we assessed and captured the formation of equivalence classes through tests of symmetry and transitivity among the printed letters, the corresponding braille letters, and their spoken names.