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251.
In the introduction to this special issue, we discuss the development of Wittgenstein's thought, distinguish what we take to be well-travelled versus less well-travelled aspects of his philosophy of psychological phenomena and summarize the diverse contributions to this collection. In order to do so, we briefly discuss the extent to which his writings themselves can properly serve as a basis for psychological theory and method. 相似文献
252.
Dr. Stefan Suhling Dr. Ulrich Rehder 《Forensische Psychiatrie, Psychologie, Kriminologie》2009,3(1):37-46
Early release, temporary absence, and minimum security confinement have been permitted less often in German prisons in recent years. There are several reasons and indications that sexual offenders are particularly affected by these developments. Prison files and recidivism data of 115 adult sexual offenders who had been in a Lower Saxony prison in the mid-1990s were analyzed for the current study to find out whether this group posed a specific risk when permitted temporary absence or minimum security confinement. It was also considered whether temporary absence and minimum security confinement were related to reduced recidivism after release. The average follow-up interval was 8.5 years. The following findings emerged: First, 50.9% were reconvicted for any offence, 21.3% with an aggressive offence, and only 7.4% were reconvicted with a sexual offence. Every fifth (19.4%) was sentenced to another prison term or had another probation term revoked. Second, rule-breaking and criminal activity by sex offenders during minimum confinement or temporary absence were very rare and of low severity. Third, sexual offenders in minimum security confinement were less likely to recidivate than others on all measures of reoffending. With Cox regression analyses that controlled for important risk factors for recidivism it was found that minimum security confinement contributed to reduced general, but not to reduced sexual or aggressive reoffending. No relationship was found between level of temporary absence status (unaccompanied vs. accompanied) and recidivism. It is concluded that, contrary to public opinion and judicial practice, sexual offenders can be granted minimum security confinement and temporary absence if an adequate selection process is implemented. 相似文献
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255.
This is the first of two articles in which we describe how infants adapt their spontaneous leg movements to changes in posture or to elicitation of behaviors by a mechanical treadmill. In this article, we compare the kinematics of kicks produced by 3-month-old infants in three postures, supine, angled (45 degrees ), and vertical, and examine the changes in muscular and nonmuscular force contributions to limb trajectory. By manipulating posture we were able to assess the sensitivity of the nascent motor system to changes in the gravitational context. The postural manipulation elicited a distinct behavioral and dynamic effect. In the more upright postures, gravitational resistance to motion at the hip was 4 to 10 times greater than resistance met in the supine posture, necessitating larger muscle torques to drive hip flexion. Kicks produced in the vertical posture showed a reduction in hip joint range of motion and an increase in synchronous joint flexion and extension at the hip and knee. At the same time, hip and knee muscle torques were also more highly correlated in kicks performed in the vertical than in the supine or angled posture. This increased correlation between muscle torques at the hip and knee implicates anatomical and energetic constraints-the intrinsic limb dynamics-in creating coordinated limb behavior out of nonspecific muscle activations. 相似文献
256.
A double response paradigm is utilized to study stimulus intensity effects upon the motor system in simple visual and auditory reaction times (RT). Subjects had to respond with both hands simultaneously upon detection of a stimulus. The RT difference of both hands is thereby of special interest, because it is considered that this variable does not contain any sensory latency and therefore allows one to study those processes that follow stimulus detection. It was found that the RT-difference distribution varies with stimulus intensity, which questions the general view that stimulus intensity affects only very early sensory stages in the processing chain. In particular, it was found that the variance of RT difference diminished with increasing stimulus intensity. This finding supports the notion of speeding up the motor process by increasing stimulus intensity. A generalization of a stochastic model by Meijers and Eijkman (1974) and Meijers, Teulings, and Eijkman (1976) is advanced to account for the findings. The central assumption is that more units (e.g., motoneurons) are activated if stimulus intensity is increased. The model’s qualitative predictions are confirmed. 相似文献
257.
Spreading-activation models of language production are only workable to the extent that they manage to solve the heat death problem, i.e., the danger that too many nodes in the network are overactive at the same time. Therefore, a delicate balance between activational and deactivational forces has to be struck. Of the three prevailing dampening mechanisms of decay, self-inhibition and other-inhibition, the latter has been selected for closer scrutiny. The key proposal of this two-part article is that activation-based models of language production cannot afford to do without an inhibitory component, in particular lateral inhibition among nodes of the same level. Psycholinguistic evidence is reviewed in an attempt to insulate inhibitory from excitatory mechanisms. Although it is difficult in normal adult language use to distinguish between the effects of excessive activation and insufficient inhibition, some patterns from language acquisition and aphasia can be shown to follow from inhibitory rather than excitatory problems, thus demonstrating the reality of inhibition. In a system of activational and deactivational forces, other-inhibition is claimed to have the excitatory mechanism of syntax as its natural opponent. It is finally argued that other-inhibition offers an explanation for some puzzling findings from the experimental literature. 相似文献
258.
We report two experiments that investigate the effect of an induced mood on the incidental learning of emotionally toned words. Subjects were put in a happy or sad mood by means of a suggestion technique and rated the emotional valence of a list of words. Later on, they were asked to recall the words in a neutral mood. For words with a strong emotional valence, mood-congruent learning was observed: strongly unpleasant words were recalled better by sad subjects and strongly pleasant words were recalled better by happy subjects. The reverse was true for slightly toned words: here, mood-incongruent learning was observed. Both effects are predicted by a two component processing model that specifies the effect of the mood on the cognitive processes during learning. Further evidence for the model is given by rating times measured in Experiment 2. 相似文献
259.
Using Sneed's metatheory an attempt is made to reconstruct Hodgkin and Huxley's theory of excitation of cell membranes. The structure of this theory is uncovered by defining set-theoretical predicates for the partial potential models, potential models, and models of the theory. The function of permeability is said to be the only theoretical function with respect to this theory. The main underlying assumptions of the theory are briefly outlined. 相似文献
260.
Goodman's theorem states that intuitionistic arithmetic in all finite types plus full choice, HA + AC, is conservative over first-order intuitionistic arithmetic HA. We show that this result does not extend to various subsystems of HA, HA with restricted induction. 相似文献