Kognitive Lernermodellierung

Different types of learner models and their usefulness for tutoring have been discussed widely since the beginning of intelligent tutoring systems. In this paper we compare pragmatic and cognitive approaches of learner modeling. Pragmatic approaches consider relevant learner features for adaptive methods in learning environments and adapt different aspects of instruction to a restricted model representing these features. Cognitive approaches aim for a psychologically adequate modeling of human problem solving. We introduce the case-based learner model ELM as an example of a cognitive approach to learner modeling. The learning environments ELM-PE and ELM-ART use ELM for adaptional methods on conceptual, plan, and episodic levels and provide individual help and learning support. Especially in the case of integrated learning environments like ELM-ART which support a variety of learning activities, a combination of pragmatic and cognitive learner models is proposed to be a necessary and useful solution.     

Stroop facilitation in tinnitus patients: an experiment conducted via the world wide web.

Cognitive mechanisms have been proposed to play an important role in tinnitus. In the present study, tinnitus participants were administered an emotional Stroop test via the Internet, incorporating words related to tinnitus concerns. In line with previous research using this Web-based version of the emotional Stroop test, faster color naming was demonstrated for concern-relevant words relative to neutral words. The present results thus provided support for a role for cognitive factors that are important for the understanding of tinnitus. However, future research is warranted in order to clarify the precise mechanisms involved in tinnitusrelated Stroop effects.     

From Psychical treatment to psychoanalysis: considerations on the misdating of an early Freud text and on a hitherto overlooked addition to it (here reproduced)

Freud's early paper Psychical (or mental) treatment, first published in a family reference book for educated lay persons, was reproduced in the Gesammelte Werke with a stated publication date of 1905. This date was subsequently called into question owing to certain parts of the subject-matter (the use of hypnosis and suggestion in 'mental treatment'), and the contribution was erroneously assigned, for instance by James Strachey, to the year 1890. This error is corrected in the present paper. Furthermore, the existence of a second edition of this reference book, which contains an addition to Freud's text and appeared in 1918-19, has previously gone unnoticed. The first edition had been published in 1905-6. Freud's contribution must, however, have been written at an appreciably earlier date. The probable time of its genesis is discussed. Freud's new text is reproduced (in English translation) for the first time in an appendix to this paper.     

Activation of CB1 specifically located on GABAergic interneurons inhibits LTD in the lateral amygdala

Previously, we found that in the lateral amygdala (LA) of the mouse, WIN55,212-2 decreases both glutamatergic and GABAergic synaptic transmission via activation of the cannabinoid receptor type 1 (CB1), yet produces an overall reduction of neuronal excitability. This suggests that the effects on excitatory transmission override those on inhibitory transmission. Here we show that CB1 activation by WIN55,212-2 and Delta(9)-THC inhibits long-term depression (LTD) of basal synaptic transmission in the LA, induced by low-frequency stimulation (LFS; 900 pulses/1 Hz). The CB1 agonist WIN55,212-2 blocked LTD via G(i/o) proteins, activation of inwardly rectifying K+ channels (K(ir)s), inhibition of the adenylate cyclase-protein kinase A (PKA) pathway, and PKA-dependent inhibition of voltage-gated N-type Ca2+ channels (N-type VGCCs). Interestingly, WIN55,212-2 effects on LTD were abolished in CB1 knock-out mice (CB1-KO), and in conditional mutants lacking CB1 expression only in GABAergic interneurons, but were still present in mutants lacking CB1 in principal forebrain neurons. LTD induction per se was unaffected by the CB1 antagonist SR141716A and was normally expressed in CB1-KO as well as in both conditional CB1 mutants. Our data demonstrate that activation of CB1 specifically located on GABAergic interneurons inhibits LTD in the LA. These findings suggest that CB1 expressed on either glutamatergic or GABAergic neurons play a differential role in the control of synaptic transmission and plasticity.     

Implicit memory bias for eating- and body appearance-related sentences in eating disorders: an application of Jacoby's white noise task

Jacoby's white noise task and an explicit recognition task were used to investigate whether individuals with eating disorders demonstrate implicit memory bias and explicit memory bias, respectively, for information related to eating and body appearance. Included were 33 women with eating disorders (seven with anorexia nervosa and 26 with bulimia nervosa), 29 with nonclinical eating disorder-related concerns, and 36 healthy controls. Results showed partial support for implicit memory bias but no support for explicit memory bias. These findings suggest that eating disorders may be characterized by relative initial automatic bias for eating disorder-relevant information but not by bias at later stages of information processing. However, previous studies have demonstrated explicit memory bias in eating disorders, which is inconsistent with this interpretation. Future research is required to clarify the precise cognitive biases associated with eating disorders.     

Identität und die Ambivalenz gegenüber Fremdem

Zusammenfassung   Anhand der Erz?hlung Ein altes Blatt und des Films Easy Rider wird die Ambivalenz gegenüber Fremdem aufgezeigt: Liebe (Xenophilie) und Hass (Xenophobie) markieren die beiden Pole. Es geht dann um die Entwicklung eines psychoanalytischen Begriffs des allt?glich-lebensweltlichen Selbstseins, der diese Ambivalenz abbildet. Dazu wird das Konzept der Identit?t herangezogen. über Eriksons Verst?ndnis hinausgehend wird Identit?t nicht nur von ihrer Leistungsseite her gesehen, der Schaffung einer einigerma?en als geordnet und sinnhaft erfahrenen Welt (Positivit?t der Identit?t). Diese Leistung wird zugleich als Abwehr verstanden, wobei das Abgewehrte als der Identit?t ebenfalls zugeh?rig betrachtet wird (Negativit?t der Identit?t). Identit?t ist durch eine konflikthafte Dynamik von Selbsterhaltung und Selbstaufhebung gepr?gt. Im allt?glich-lebensweltlichen Kontext dominiert die Selbsterhaltungstendenz. In der Ambivalenz gegenüber Fremdem spiegelt sich die Dynamik von Selbsterhaltung (Ablehnung) und Selbstaufhebung (Anziehung). Genauer noch ist die Anziehung durch das Fremde als M?glichkeit zu verstehen, das Last- und Zwanghafte der Identit?tspositivit?t zu ver?ndern, d. h. ein Anderer werden zu k?nnen. Auf der Grundlage dieser überlegungen werden zwei Aspekte der Identit?t in der Postmoderne dargestellt: die Entwicklung einer adoleszent anmutenden Identit?tsstruktur und die Bedeutung der enormen Fülle von Fremdem, die die Globalisierung mit sich bringt. Ein Fallbeispiel zeigt, wie sich eine Angstsymptomatik als Ausdruck eines Identit?tswiderstands gegen die durchgreifende ?konomisierung der Arbeitsumgebung verstehen l?sst. Das klinische Material macht deutlich, dass die vorangehenden überlegungen auch für den klinischen Diskurs von Relevanz sind.

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Identity and ambivalence towards the stranger

Abstract   On the basis of the tale An Old Leaf and the movie Easy Rider, it will be shown that people have a deep-seated ambivalence towards what they recognize as extraneous to their own way of being. Xenophilia (attraction, love) and xenophobia (repulsion, hatred) are the two poles of the ambivalence. A psychoanalytic concept of being in one’s own everyday life-world in a way which comprehends the ambivalence of xenophilia and xenophobia is formulated. For this purpose the concept of personal identity is used. In contrast to Erikson identity is not restricted to its function of constituting an inner world for the subject, which is at least to a certain degree ordered and meaningful (positivity of identity). Rather, the positivity of identity is functioning defensively as well. What is fended off is not annihilated mentally, but it belongs to the subject’s identity (negativity of identity). Personal identity is thus conceptualized as a dynamic structure with two opposing forces, viz. identity-maintenance (mirrored in xenophobia), and identity-suspension (mirrored in xenophilia). In postmodernity the structure of identity resembles an adolescent one with the centre of identity shifting from the positivity of identity in the direction of its negativity. Due to processes of globalization there is a growing burden of influences on the subject’s identity that come from beyond the everyday life-world. Case material is presented that shows the clinical relevance of the ideas that have been developed. Severe symptoms of anxiety could be understood as an identity-maintaining resistance by opposing the transformation of the patient’s working conditions for the purpose of short-term economic goals only.

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überarbeitete Fassung eines Vortrags, gehalten anl?sslich der DPG-Jahrestagung „Psychoanalyse in Zeiten der Globalisierung. Struktur und Identit?t im Wandel“, 22.–25. 5. 2008 in München     

Does Acquisitive Self‐Presentation in Personality Self‐Ratings Enhance Validity? Evidence from two experimental field studies

The aim of the present research was to demonstrate that acquisitive self‐presentation in personality scales is not a barrier to their criterion‐related validities in human resource contexts, but rather a means to improve them. A pilot study (Study 1) with 96 job incumbents provided preliminary positive evidence. In Study 2, in the experimental group (n=99), the instructions asked job incumbents to work on a Big‐Five personality inventory (BFI‐K) as if they took part in a personnel selection procedure for a personally very attractive position. In the control group (n=93) of Study 2, job incumbents were asked to answer the inventory items honestly. As expected, the correlation between the self‐ratings of the motive to get along (i.e., which comprises emotional stability, conscientiousness, and agreeableness) and contextual performance assessments was significantly higher in the experimental group than in the control group in Study 2. Additionally, the correlation between the self‐ratings of the motive to get ahead (i.e., which comprises extraversion and openness to experience) and task performance and leadership assessments was significantly higher in the experimental group than in the control group in Study 2. It is proposed that responding to a personality inventory in a human resource decision situation should be conceptualized as a workplace simulation.