Quiet Ego and Subjective Well-Being: The Role of Emotional Intelligence and Mindfulness

Journal of Happiness Studies - The quiet ego refers to a self-identity that is balanced and growth-oriented in its stance toward the self and others. As a relatively new construct, its validity has...     

Discrimination of acoustic communication signals by grasshoppers (Chorthippus biguttulus): temporal resolution, temporal integration, and the impact of intrinsic noise

A characteristic feature of hearing systems is their ability to resolve both fast and subtle amplitude modulations of acoustic signals. This applies also to grasshoppers, which for mate identification rely mainly on the characteristic temporal patterns of their communication signals. Usually the signals arriving at a receiver are contaminated by various kinds of noise. In addition to extrinsic noise, intrinsic noise caused by stochastic processes within the nervous system contributes to making signal recognition a difficult task. The authors asked to what degree intrinsic noise affects temporal resolution and, particularly, the discrimination of similar acoustic signals. This study aims at exploring the neuronal basis for sexual selection, which depends on exploiting subtle differences between basically similar signals. Applying a metric, by which the similarities of spike trains can be assessed, the authors investigated how well the communication signals of different individuals of the same species could be discriminated and correctly classified based on the responses of auditory neurons. This spike train metric yields clues to the optimal temporal resolution with which spike trains should be evaluated.     

Visual control of posture in real and virtual environments

In two experiments, we investigated the stabilizing influence of vision on human upright posture in real and virtual environments. Visual stabilization was assessed by comparing eyes-open with eyes-closed conditions while subjects attempted to maintain balance in the presence of a stable visual scene. Visual stabilization in the virtual display w as reduced, as compared wit hreal-world viewing. Th is differencewas partially accountedfor by the reduced field of view in the virtual display. When the retinal flow inthe virtual display wasremoved by using dynamic random-dot stereograms with single-frame lifetimes (cyclopean stimuli), vision did notstabilize posture. There was also an overall larger stabilizing influence of vision when more unstable stances were adopted (e.g., one-foot, as compared with side-by-side, stance). Reducing the graphics latency of the virtual display by 63% did not increase visual stabilization in the virtual display. Other visual and psychological differences between real and virtual environments are discussed.     

Unerwünschte und schädliche Wirkungen von Psychotherapie

Unwanted effects or even damage due to psychotherapy are largely neglected issues within psychotherapy research as compared to other fields. On the other hand, it is reasonable to assume that unwanted effects of a treatment which intends to influence patients into a positive direction are very likely. The rate of negative effects of psychotherapy (the deterioration effect according to Bergin) is consistently estimated to be 10% of all cases and shows this same rate in a variety of studies. This review highlights side effects of psychotherapy both on the part of the patients and of the therapists. It reports unwanted effects related to different psychotherapeutic methods, i.e. psychoanalysis, cognitive behaviour therapy, client-centered psychotherapy and – beyond these basic orientations – group psychotherapy. The paper also reports on negative effects of psychotherapy on an untreated partner. Finally, some proposals are given on how negative effects of psychotherapy could be diminished. The authors especially highlight the possibilities of changing the therapist, the treatment technique, or the theoretical treatment approach as a way to reduce negative effects.     

Brauchen wir Richtlinien oder Leitlinien für psychotherapeutische Behandlungen?

In many countries, psychotherapy is increasingly influenced by standards of scientifically evaluated methods and disorder-specific approaches. Referring to the definitions of the Scientific Council for Psychotherapy in Germany (WBP) concerning the differentiation of modalities, methods and techniques, this article points out that clear distinctions between modalities and methods are increasingly vanishing; instead, the tendency, especially within behavior therapy, to integrate all scientifically based methods and techniques is prevailing. This trend runs parallel with a development away from ?disorder-specific“ to a ?disorder-oriented“ approach. Facing the fact that technical aspects explain a relatively small proportion of outcome variance in psychotherapy, research related to the quality of psychotherapists is recommended. In addition, ?empirically validated psychotherapists“ should receive guidelines instead of rules of action.     

He said,she said: Episodic retrieval induces conflict adaptation in an auditory Stroop task

People respond more slowly if an irrelevant feature of a target stimulus is incompatible with the relevant feature or the correct response. Such compatibility effects are often reduced in trials following an incompatible trial, which has been taken to reflect increased cognitive control. This pattern holds only if two trials share some similarities, however, suggesting that it may be modulated by the episodic context. To look into this possibility, we had participants respond to high- or low-pitched tones by saying “high” or “low,” respectively, and ignore the simultaneously presented auditory word “high” or “low.” As expected, performance was impaired if the heard word was incompatible with the required response, and this Stroop-like effect was reduced after incompatible trials. This sequential modulation was observed, however, only if the voice in the two successive trials was the same, whereas no modulation was obtained when the speaker changed. The results suggest that sequential modulations are due to the automatic retrieval of episodic event representations that integrate stimuli, actions, and situational and task-specific control information, so that later reactivation of some elements of a given representation tends to retrieve the other elements as well.     

Free-Variable Tableaux for Propositional Modal Logics

Free-variable semantic tableaux are a well-established technique for first-order theorem proving where free variables act as a meta-linguistic device for tracking the eigenvariables used during proof search. We present the theoretical foundations to extend this technique to propositional modal logics, including non-trivial rigorous proofs of soundness and completeness, and also present various techniques that improve the efficiency of the basic naive method for such tableaux.