Task performance and electromyopotential as functions of task difficulty and EMG feedback

The dearth of empirical research in the application of biofeedback is discussed. Exp. 1 assessed relationships among biofeedback EMG training, EMG levels, cognitive task performance, and task difficulty. 72 subjects (male or female college students) were administered 1 trial on an iconic memory task with either EMG audio feedback, sham EMG audio feedback, or no feedback. Three levels of task difficulty were used. One 20-min. training session significantly lowered EMG responses, and task performance was inversely related to task difficulty. No relationship between EMG level and task performance was observed. Exp. 2 investigated the effect of increased EMG responses on cognitive task performance for one level of difficulty. One biofeedback training session did not significantly increase frontalis EMG, and there was no relationship between increased EMG and task performance.     

Eine Auch Sich Selbst Missverstehende Kritik: Über das Reflexionsdefizit Formaler Explikationen

The criticism formulated by L. B. Puntel concerning the theory of dialectic proposed by the author is rejected. Puntel's attempt at explicating predication by means of (second order) predicate logic fails: It misjudges predication being already presupposed for the possibility of predicate logic, thus belonging to the transcendental conditions of formal predicate logic, so that predication itself cannot be further explicated by means of such logic. What is in fact criticized by Puntel is something like an artefact of formalization. The unreflected application of formal logic here generates problems instead of solving them.     

Case study: Controlling self-injurious escape behaviors

The present study investigated the effects of a treatment program on the self-injurious behaviors of a 12-year-old autistic male. Initial observations indicated that these behaviors functioned primarily as escape responses to terminate performance demands. For 1 year the subject received general compliance training with the frequency of demands being systematically increased through consecutive treatment weeks. The subject's self-injurious behaviors were no longer reinforced by his escaping from demands nor did they receive social attention. Compliance to demands and appropriate behaviors in general were positively reinforced. The treatment produced substantial reductions in the rates of self-injurious behaviors and increased compliance. Additionally, the intensity of the subject's self-injurious behaviors decreased over the course of treatment. The present study suggests that the treatment approach is a reliable means of not only reducing self-injurious behaviors but also expanding performance repertoires.     

Co-morbidity of crying and feeding problems with sleeping problems in infancy: Concurrent and predictive associations

The co-morbidity of crying, feeding and sleeping problems at 5 months of age was investigated in a representative sample of 432 infants in South Germany. A crying, sleeping or feeding problem was reported in 32.7% of these infants by their parents and a further 14.6% had two or more of these problems. Little co-morbidity between crying and feeding problems was found. There were moderate to strong associations between crying and sleeping behaviours. Feeding problems showed little relationship to sleeping behaviour, but feeding type and frequency of feeds were related to night waking. Breastfed infants woke much more often at night. Crying and feeding problems at 5 months were poor predictors of sleeping behaviour at 20 or 56 months of age. Later sleeping behaviour was best predicted by infant sleeping behaviour. At 56 months, maternal distress due to sleeping and co-sleeping practices was predicted by maternal distress due to crying and feeding practices at 5 months of age. The predictions were significant but generally weak to modest in strength. Future studies on the consequences of crying or feeding problems should take into account patterns of co-morbidity. So-called ‘post-colicky’ sleep problems are not due to increased crying per se but rather appear to be the consequence of associated infant sleeping problems and parental caretaking patterns for dealing with night waking in infancy.     

Recollecting events associated with victimization

Subjects first completed social desirability and anxiety personality scales and then read a story about a woman meeting her brother for lunch. Some subjects were then told that the story involved sexual abuse. A week later all subjects took a multiple-choice memory test over the story. The results indicated that subjects categorized as repressors based on the personality scales had a lower proportion of negative than positive errors than did the nonrepressors, but only when they believed the story was about sexual abuse. However, repressors answered correctly as many items as did nonrepressors. The results were consistent with the idea that repressors remember as much about victimization experiences as do nonrepressors but are more likely to fill in the missing details of victimization experiences with positive reconstructions designed to reduce the over-all negative quality associated with victimization.     

A family/systems approach to illness-maintaining behaviors in chronically ill adolescents

A distressingly significant number of chronic, seriously ill adolescents demonstrate poor medical management of their illnesses through "illness-maintaining behaviors." These behaviors are defined in this article as any action that compromises chronically ill adolescents' care and prevents them from functioning optimally. Current conceptualizations of illness-maintaining behaviors offer explanations that view these behaviors as individually focused, using either psychodynamic or behavioral models. This article, however, presents a family systems model of illness-maintaining behaviors. A therapeutic framework leading to specific intervention strategies is also developed.     

Conditioned suppression in the gerbil

The present report describes apparatus and procedures for investigating conditioned suppression of a running response in the gerbil. Data are presented which demonstrate that the conditioned suppression observed in this situation is not an artifact of alpha responses, pseudoconditioning, or sensitization. An analysis of differential conditioning indicated that cue similarity and US intensity are negatively related to cue-specific differential responding.     

What children say when the teacher is not around: conflicting goals in social comparison and performance assessment in the classroom

Naturalistic observations and interviews with children in kindergarten, first, second, and fourth grades were used to examine developmental shifts in the focus of social comparison and the expression of comparative and evaluative interests in relation to possibly conflicting goals. First, observers coded the content of peer exchanges and direction of visual gaze during class work times. Children were then interviewed about help seeking and reading performance in the classroom. Classroom observations revealed that comparisons related to personal aspects of peers declined with age, whereas evaluative comments and comparisons related to performance assessment increased sharply in first grade. In the higher grades, blatantly evaluative and comparative statements decreased, whereas more subtle and functional performance-related exchanges continued to increase. Interviews showed that differences in classroom behaviors were associated with knowledge of classroom performance hierarchies, the salience of general ability, and self-evaluation. The data patterns are interpreted in terms of two converging processes: self-socialization and goal conflict. Implications for social comparison theory are also discussed.     

Air pollution, weather, and violent crimes: concomitant time-series analysis of archival data

Archival data covering a 2-year period were obtained from three sources in order to assess relations among ozone levels, nine measures of meteorological conditions, day of the week, holidays, seasonal trends, family disturbances, and assaults against persons. Confirming results obtained in laboratory studies, more family disturbances were recorded when ozone levels were high than when they were low. Two-stage regression analyses indicated that disturbances and assaults against persons were also positively correlated with daily temperatures and negatively correlated with wind speed and levels of humidity. Further, distributed lag (Box-Jenkins) analyses indicated that high temperatures and low winds preceded violent episodes, which occurred more often on dry than humid days. In addition to hypothesized relations, it was also found that assaults follow complaints about family disturbances, which suggests that the latter could be used to predict and lessen physical violence. It was concluded that atmospheric conditions and violent episodes are not only correlated but also appear to be linked in a causal fashion. This conclusion, however, was qualified by a discussion of the limitations of archival data and concomitant time-series analysis.