The learning of goal-directed locomotion: A perception-action perspective

This study was designed to better understand the process underlying the learning of goal-directed locomotion. Subjects walked on a treadmill in a virtual reality setting and were asked to cross pairs of oscillating doors. The subjects' behaviour was examined at the beginning of the learning process (pretest), after 350 trials (intermediate test), and after 700 trials (posttest). The data were analysed at three different levels, each representing a specific aspect of the global response: performance outcome, displacement kinematics, and current arrival condition. While some aspects of performance outcome suggested the presence of a ceiling effect in the intermediate test, both displacement kinematics and current arrival condition clearly highlighted continuous transformations of the control mechanism involved. The learning process is best described as (1) the establishing of a relationship between specific information and a movement parameter and (2) the optimization of this relationship. The optimization process is characterized by the further exploration of the available behavioural repertoire and by the refinement of the dialogue between information and movement.     

The Visible Christ and the Invisible Trinity: MT. 5:8 in Augustine's Trinitarian Theology of 400

The essay is an analysis of Augustine's solution to what I identify as the Homoian subordinationist understanding of the Son's visibility. This solution lies in Augustine's (re-)interpretation of Old Testament theophanies, and his doctrine of the vision through Christ of the Trinity at the end-time which Augustine supports by an exegesis of Mt. 5:8. Historically, the issue for Augustine is the connection made between doctrines of the Son's inherent "visibility" before the Incarnation and arguments made both against modalism and in support of subordinationism on the basis of that visibility. For Augustine's own Trinitarian theology, any consideration of a sight or vision of God in, e.g., Old Testament theophanies or the Incarnation necessarily raises questions about "sight" as both sensible and noetic knowledge, the structure of our way(s) of knowing, and the role of faith as the means for purifying the knowing capacity in humanity. The question of the vision of God which Augustine addresses in those early books of de Trinitate which are written around the year four hundred is connected to Augustine's epistemological concerns addressed in a variety of writings written before or contemporary to books I-IV of de Trinitate .     

Die Typologie C. G. Jungs als Gegenstand empirischer Persönlichkeitsforschung

Ohne Zusammenfassung     

Algorithmic solution of arithmetic problems and operands-answer associations in long-term memory

Many developmental models of arithmetic problem solving assume that any algorithmic solution of a given problem results in an association of the two operands and the answer in memory (Logan & Klapp, 1991; Siegler, 1996). In this experiment, adults had to perform either an operation or a comparison on the same pairs of two-digit numbers and then a recognition task. It is shown that unlike comparisons, the algorithmic solution of operations impairs the recognition of operands in adults. Thus, the postulate of a necessary and automatic storage of operands-answer associations in memory when young children solve additions by algorithmic strategies needs to be qualified.     

Head and eye movements affect object processing in 4‐month‐old infants more than an artificial orientation cue

This study investigates the effects of attention‐guiding stimuli on 4‐month‐old infants' object processing. In the human head condition, infants saw a person turning her head and eye gaze towards or away from objects. When presented with the objects again, infants showed increased attention in terms of longer looking time measured by eye tracking and an increased Nc amplitude measured by event‐related potentials (ERP) for the previously uncued objects versus the cued objects. This suggests that the uncued objects were previously processed less effectively and appeared more novel to the infants. In a second condition, a car instead of a human head turned towards or away from objects. Eye‐tracking results did not reveal any significant difference in infants' looking time. ERPs indicated only a marginally significant effect in late slow‐wave activity associated with memory encoding for the uncued objects. We conclude that human head orientation and gaze direction affect infants' object‐directed attention, whereas movement and orientation of a car have only limited influence on infants' object processing.