An LCD tachistoscope with submillisecond precision

Tachistoscopes allow brief visual stimulation delivery, which is crucial for experiments in which subliminal presentation is required. Up to now, tachistoscopes have had shortcomings with respect to timing accuracy, reliability, and flexibility of use. Here, we present a new and inexpensive two-channel tachistoscope that allows for exposure durations in the submillisecond range with an extremely high timing accuracy. The tachistoscope consists of two standard liquid-crystal display (LCD) monitors of the light-emitting diode (LED) backlight type, a semipermeable mirror, a mounting rack, and an experimental personal computer (PC). The monitors have been modified to provide external access to the LED backlights, which are controlled by the PC via the standard parallel port. Photodiode measurements confirmed reliable operation of the tachistoscope and revealed switching times of 3?μs. Our method may also be of great advantage in single-monitor setups, in which it allows for manipulating the stimulus timing with submillisecond precision in many experimental situations. Where this is not applicable, the monitor can be operated in standard mode by disabling the external backlight control instantaneously.     

Recovery opportunities,work–home conflict,and emotional exhaustion among hematologists and oncologists in private practice

Hematologists and oncologists in private practice play a central role in the care provided for cancer patients. The present study analyzes stress and relaxation aspects in the work of hematologists and oncologists in private practice in Germany in relation to emotional exhaustion, as a core dimension of burnout syndrome. The study focuses on the opportunities for internal recovery using breaks and time out during the working day, the frequency of working on weekends and on vacation, and the physician’s work–home and home–work conflict. Postulated associations between the constructs were analyzed using a structural equation model. If work leads to conflicts in private life (work–home conflict), it is associated with greater emotional exhaustion. Working frequently at the weekend is associated with greater work–home conflict and indirectly with greater emotional exhaustion. By contrast, the availability of opportunities to relax and recover during the working day is associated with less work–home conflict and indirectly with less emotional exhaustion. These results underline the importance of internal recovery opportunities during the working day and a successful interplay between working and private life for the health of outpatient hematologists and oncologists.     

Why Citizen Kane was unhappy: Motive‐Goal Incongruence

Why do some people benefit more from successfully pursuing their goals than others? Motivational psychology has recently come up with an answer to this question: People differ in the extent to which their goals are aligned with their implicit motives. That is, on a conscious level, people may strive for, for example, achievement goals although on an unconscious level their implicit achievement motive is low. In such a case of motive–goal incongruence, pursuit and realization of achievement goals are associated with little or no well‐being. On the other hand, for people whose conscious goals and implicit motives are congruent, goal progress is strongly associated with well‐being. Legendary movie character Charles Foster Kane from Citizen Kane illustrates this dilemma: Constantly pursuing and realizing power goals, he does not succeed in satisfying his affiliation‐intimacy motive – and finally dies an unhappy man. The present article reviews what is known about the causes and effects of motive–goal congruence. In doing so, open questions are raised that future research ought to address.     

Is structural underdetermination possible?

Structural realism is sometimes said to undermine the theory underdetermination (TUD) argument against realism, since, in usual TUD scenarios, the supposed underdetermination concerns the object-like theoretical content but not the structural content. The paper explores the possibility of structural TUD by considering some special cases from modern physics, but also questions the validity of the TUD argument itself. The upshot is that cases of structural TUD cannot be excluded, but that TUD is perhaps not such a terribly serious anti-realistic argument.     

‘Mr K’ – A successful case of analytic oriented therapy documented empirically: the role of the therapeutic relationship and reflexive self-awareness

A successful case of analytic treatment over the course of 250 sessions is described from different perspectives, including considerations from the two-year follow-up. The therapeutic alliance and the patient’s experiencing were evaluated. Pre-treatment diagnosis was validated via diagnostic interview. Symptoms and interpersonal problems were assessed at intervals. Data were analysed using two different time-series analyses. Aspects of agency with regard to mentalizing capacity were assessed with the Metacognitive Assessment Scale. We obtained the following main results: (1) Symptoms and interpersonal problems improved continuously until the end of treatment. Symptom severity fell to below the clinical cut-off. This successful outcome remained stable at the two-year follow-up. (2) The therapeutic relationship improved during the therapeutic process. (3) The patient’s capability for reflexive self-awareness, operationalized as experiencing, decreased. (4) The metacognitive mastery of the patient increased. The following conclusions were made after combining the empirical data with the clinical observations: (1) Mr K improved clinically in terms of symptoms, self-regulation and interpersonal problems as a result of his gaining affect control. (2) The patient’s experiencing does not capture a positive outcome in all cases. (3) Aspects of agency (i.e. metacognitive mastery) deserve further attention in psychoanalytic treatments.     

New account of empirical claims in structuralism

In this paper, a new account of empirical claims in structuralism is developed. Its novelty derives from the use that is made of the linguistic approach to scientific theories despite the presumed incompatibility of structuralism with that approach. It is shown how the linguistic approach can be applied to the framework of structuralism if the semantic foundations of that approach are refined to do justice to the doctrine of indirect interpretation of theoretical terms. This doctrine goes back to Carnap but has been advanced until the present day without a proper semantic explanation.     

Correlation versus causation in multisensory perception

Events are often perceived in multiple modalities. The co-occurring proximal visual and auditory stimuli events are mostly also causally linked to the distal event, which makes it difficult to evaluate whether learned correlation or perceived causation guides binding in multisensory perception. Piano tones are an interesting exception: They are associated with the act of the pianist striking keys, an event that is visible to the perceiver, but directly results from hammers hitting strings, an event that typically is not visible to the perceiver. We examined the influence of seeing the hammer or the keystroke on auditory temporal order judgments (TOJs). Participants judged the temporal order of a dog bark and a piano tone, while seeing the piano stroke shifted temporally relative to its audio signal. Visual lead increased “piano-first” responses in auditory TOJ, but more so if the associated keystroke was visible than if the sound-producing hammer was visible, even though both were equally visually salient. This provides evidence for a learning account of audiovisual perception.     

Influences of information processing and disengagement in infants' looking behaviour

The present study considers the joint influences of information processing and disengagement in looking behaviour within a habituation paradigm. Six‐month‐old infants were habituated, during which their heart rate (HR) was measured. A parametric model of habituation yielded for each infant parameter estimates of their habituation performance. These parameters were interpreted as assessing information processing and disengagement. Corresponding measures were obtained from the HR data. The HR measures and habituation model parameter estimates were significantly correlated, as predicted. In addition, an attention getter, presented prior to each habituation trial, influenced indicators of information processing, but not of disengagement. Results confirmed the advantages of a modelling approach. In addition, and more importantly, findings led to the conclusion that both information processing as well as disengagement are involved in infants' looking behaviour in visual habituation. Copyright © 2009 John Wiley & Sons, Ltd.     

Ontological Aspects of Measurement

The concept of measurement is fundamental to a whole range of different disciplines, including not only the natural and engineering sciences, but also laboratory medicine and certain branches of the social sciences. This being the case, the concept of measurement has a particular relevance to the development of top-level ontologies in the area of knowledge engineering. For this reason, the present paper is concerned with ontological aspects of measurement. We are searching for a list of concepts that are apt to characterize measurement methods in a general manner. To establish such means of characterization, we will primarily deal with the semantics of measurement values.