Exploring cross-task compatibility in perceiving and producing facial expressions using electromyography

Using a dual-task methodology we examined the interaction of perceiving and producing facial expressions. In one task, participants were asked to produce a smile or a frown (Task 2) in response to a tone stimulus. This auditory-facial task was embedded in a dual-task context, where the other task (Task 1) required a manual response to visual face stimuli (visual-manual task). These face stimuli showed facial expressions that were either compatible or incompatible to the to-be-produced facial expression. Both reaction times and error rates (measured by facial electromyography) revealed a robust stimulus–response compatibility effect across tasks, suggesting that perceived social actions automatically activate corresponding actions even if perceived and produced actions belong to different tasks. The dual-task nature of this compatibility effect further testifies that encoding of facial expressions is highly automatic.     

Switching attention between modalities: further evidence for visual dominance

The present study examined cross-modal selective attention using a task-switching paradigm. In a series of experiments, we presented lateralized visual and auditory stimuli simultaneously and asked participants to make a spatial decision according to either the visual or the auditory stimulus. We observed consistent cross-modal interference in the form of a spatial congruence effect. This effect was asymmetrical, with higher costs when responding to auditory than to visual stimuli. Furthermore, we found stimulus-modality-shift costs, indicating a persisting attentional bias towards the attended stimulus modality. We discuss our findings with respect to visual dominance, directed-attention accounts, and the modality-appropriateness hypothesis.     

Performance in auditory and visual emotional stroop tasks: a comparison of older and younger adults

Research has shown age-related declines in the cognitive ability to inhibit irrelevant information. Thirty-six younger adults (mean age = 22 years) and 36 older adults (mean age = 74 years) performed 2 versions of an emotional Stroop task. In one, they made lexical decisions to emotion words spoken in 1 of several tones of voice. Latencies were longer for test words spoken in an incongruent tone of voice, but only for older adults. In another, words were displayed on a computer screen in a colored font, and participants quickly named the font color. Latencies were longer for test words high on arousal, but only for older adults. Results are discussed in terms of inhibitory cognitive processes, attention, and theories of emotional development.     

Exogenous influences on task set activation in task switching

To explore the effect of exogenous processes on cognitive control, we used a cueing task-switching paradigm with two spatial judgement tasks and added an irrelevant colour attribute to the task-relevant spatial attribute of the target. The colour was not related to any specific Stimulus-Response relation in the tasks. A correlation was created between stimulus colour and task identity. This correlation was strong but imperfect in Experiment 1 and perfect in Experiment 2. As a result of the colour-task correlation, stimuli contained redundant information about task identity. By changing the correlation pattern every few blocks we caused this information to be sometimes invalid. In both experiments, performance was worse when the information carried by the target was invalid than when it was valid. However, this effect was exclusive to conditions with short task preparation time. By comparing performance with a control group, which had no colour-task correlation (in Experiment 2) we established that the colour manipulation did not cause a qualitative change in preparation strategy, and that the exogenous effect was stronger in switch trials than in repetition trials. We conclude that exogenous processes that are related to task set affect performance primarily if they are presented before endogenous processes of task set preparation have been launched.     

The F-wave in healthy subjects - origin, derivation, standardization

The determination of the maximum F-wave conduction speed by means of the photographic superposition technique is a method that can be carried out in a technically simple manner and can give an insight into the peripheral motor neuron up to the anterior horn cell. The values can be determined in a more exact manner than the respective motor conduction speeds. Similar to the motor conduction speed, influencing factors are to be taken into consideration such as the temperature and the age of patients under ten years. The normal values for the N. ulnaris, radialis, fibularis and tibialis are submitted.     

Representations of dread: the dreaded self and the dreaded state of the self

The experience of dread, an extreme form of fear that is induced by terror and horror, is seen as manifested in the shapes of a "dreaded self" and a "dreaded state of the self." These representations reflect psychic dangers ranging from a common, feared identification to states of disconnection, desolation, ego dissolution, and nonexistence. It is suggested that life crises and traumatic impingements, informed by developmental and psychic realities, are critical determinants of multiple dreaded self-representations; that disavowal often serves to massively ward off the recognition of the awful; and that these representations serve a preconscious signal function that anticipates the danger of reexperiencing an original terror. Case examples illustrate these points and reflect the utility of the language of dreaded representations in the treatment situation.     

Treatment of extrapyramidal hyperkineses in childhood with tiapride

34 children with extrapyramidal hyperkinesis were treated with Tiaprid. With 22 children the extrapyramidal syndromes could be reduced considerably or disappeared. A reduction of vigilance in the phase of adjustment was the only side effect.     

Computerized tomography findings in malignant progressive Duchenne muscular dystrophy

A correct diagnosis of progressive muscle dystrophy type Duchenne is important for consultation of the family of patients. The muscles of neck, shoulder, back, pelvis and legs of 23 patients were examined by computed tomography. The density of selected muscles were measured and compared with that of normal probands. Typical changes in the density-pattern were found. It is show, that the measurement of the density-pattern of muscles in pelvis and legs is sufficient for a sure diagnosis of progressive muscle dystrophy Duchenne.     

Differential effects of congenital left and right brain injury on intelligence

IQ performance was compared in 28 prepubertal children with unilateral left vs. right hemisphere preperinatal injury. Results indicated statistically superior FSIQ and VIQ in the left-lesioned group. Findings were interpreted as consistent with the hypothesis of a left-right maturational gradient, whereby early right hemisphere damage has a more severe effect on overall intellectual functioning than early left injury. Findings also lend support for a greater crowding effect, as seen in the sparing of verbal skills, after early left hemisphere injury.     

Family cigarette smoking and test performance by adolescents

This research considers test performance by adolescents as a correlate of cigarette smoking by their families. Scores obtained by adolescents on the California Achievement Test decreased as the amount of cigarette smoking by other members of their families increased. The relationship was not accounted for by active cigarette smoking of the adolescent or by 20 other social and psychological variables.