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Die Adipositas und ihre mitunter schwerwiegenden Auswirkungen nimmt in öffentlichen Diskussionen einen immer größeren Stellenwert ein. In Deutschland leiden neben 37 Millionen Erwachsenen derzeit rund 2 Millionen Kinder an Übergewicht oder Adipositas. Das Arbeitsbuch wendet sich an die Eltern betroffener Kinder. Erklärt wird die Entstehung der Adipositas, zudem sind Informationen zu gesunder Ernährung und deren Umsetzung im Alltag enthalten. Zusätzlich wird auf den wichtigen Faktor der Bewegung sowie eine mögliche erneute Gewichtszunahme eingegangen. Entwickelt wurde das Arbeitsbuch im Rahmen einer Studie und spricht die teilnehmenden Eltern an, deren Kinder sich aufgrund von Adipositas in einer Reha-Klinik befinden. Die enthaltenen Informationen und Alltagshilfen sind jedoch auch für alle anderen betroffenen Eltern relevant.
Using a serial search paradigm, we observed several effects of within-object fixation position on spatial and temporal control of eye movements: the preferred viewing location, launch site effect, the optimal viewing position, and the inverted optimal viewing position of fixation duration. While these effects were first identified by eye-movement studies in reading, our approach permits an analysis of the functional relationships between the effects in a different paradigm. Our results demonstrate that the fixation position is an important predictor of the subsequent saccade by influencing both fixation duration and the selection of the next saccade target.
Aims: To investigate whether concurrent alcohol and tobacco use during early adolescence characterizes a subgroup that differs from users of one substance only regarding several risk factors for later substance use problems. Methods: Participants were from a prospective longitudinal cohort study of 384 children at risk for later psychopathology, with the majority being born with obstetric complications and psychosocial adversities. Assessments of adolescent drug consumption and related intrapersonal characteristics were obtained at age 15. Results: Compared to consumers of alcohol only, 15-year-olds drinking and smoking during the same time period (past 4 weeks) had significantly higher levels of consumption and more excessive use of alcohol, started drinking at an earlier age, had higher scores on the Fagerstrom Test for Nicotine Dependence, and more cannabis use. This group could be distinguished from users of alcohol only by higher novelty seeking and more positive alcohol effect expectancies. Compared to consumers of tobacco only, concurrent users reported higher nicotine dependence and more cannabis use. No significant differences were observed regarding frequency and age at initiation of tobacco use, tobacco-related sensitivity, self- efficacy and instrumentality as well as novelty seeking. Conclusions: Concurrent alcohol and tobacco use during early adolescence is associated with characteristics that are well known as risk factors for later alcohol use problems and dependence and that should be targeted by prevention programs.
How distinct implicit and explicit motive systems differ has long been unclear. Schultheiss' (2001) information processing account of implicit motive arousal hypothesized that implicit motives respond to nonverbal stimuli to influence non-declarative measures of motivation and that explicit motives respond to verbal stimuli to influence declarative measures of motivation. Moreover, in individuals high in referential competence, i.e., with the ability to quickly translate non-verbal stimuli into a verbal representation, implicit motives are thought to respond to verbal stimuli and influence declarative measures of motivation and explicit motives are thought to respond to nonverbal stimuli and to influence non-declarative measures of motivation. The present study tested these hypotheses by assessing liking ratings as a declarative response format and an affective stroop task as a non-declarative response format using emotion words as verbal and emotional facial expressions as non-verbal stimuli. Individual power, affiliation, and achievement motive dispositions were assessed via the Picture Story Excercise for implicit motives and via questionnaires for explicit motives. Referential competence was assessed via a colour-naming/-reading task. I found that as expected explicit and implicit motives overall were not correlated across subjects. Moreover, implicit and explicit motives affected declarative and non-declarative responses for verbal and non-verbal stimuli. As predicted, however, implicit motives responded to verbal stimuli and influenced declarative responses more strongly for individuals high compared to those low in referential competence. Likewise, explicit motive effects were moderated by referential competence in some - but not all - of the predicted conditions. These results show that implicit and explicit motives can influence declarative and non-declarative responses to verbal and non-verbal stimuli. They support the hypothesis that referential processing is needed for implicit motives to respond to verbal stimuli and influence declarative response formats, and they partly support the hypothesis that referential processing plays a role for the influence of explicit motives. Results for explicit motives may suggest that new measures are needed to assess the referential competence to translate verbal stimuli into non-verbal representations. Overall, the findings provide support to the information processing account of implicit motive arousal by Schultheiss' (2001), suggesting that a non-verbal and non-declarative implicit motive system and a distinct verbal and declarative explicit motive system interact via referential processing, i.e., by translating information between representational formats.
Einführung und Überblick
(2007)
Microsaccades are an important component of the small eye movements that constitute fixation, the basis of visual perception. The specific function of microsaccades has been a long-standing research problem. Only recently, conclusive evidence emerged, showing that microsaccades aid both visual perception and oculomotor control. The main goal of this thesis was to improve our understanding of the implementation of microsaccade generation within the circuitry of saccade control, an unsolved issue in oculomotor research. We make a case for a model according to which microsaccades and saccades result from mutually dependent motor plans, competing for expression. The model consists of an activation field, coding for fixation at its center and for saccades at peripheral locations; saccade amplitude increases with eccentricity. Activity during fixation spreads to slightly peripheral locations in the field and, thus, may result in the generation of microsaccades. Inhibition of remote and excitation of neighbouring locations govern the dynamics of the field, resulting in a strong competition between fixation and saccade generation. We propose that this common-field model of microsaccade and saccade generation finds a neurophysiological counterpart in the motor map of the superior colliculus (SC), a key brainstem structure involved in the generation of saccades. In a series of five behavioral experiments, we tested implications of the model. Predictions were derived concerning (1) the behavior of microsaccades in a given task (microsaccade rate, amplitude, and direction), (2) the interactions of microsaccades and subsequent saccades, and (3) the relationship between microsaccadic behavior and neurophysiological processes at the level of the SC. The results yielded strong support for the model at all three levels of analysis, suggesting that microsaccade statistics are indicative of the state of the fixation-related part of the SC motor map.
Objective: Despite theoretical discrepancies between different concepts of temperament, some core dimensions are thought to be common to the various models. We compared temperamental traits derived from the New York Longitudinal Study (NYLS) model and the Cloninger dimensions in the developmental course and investigated the associations of temperament with sex as well as with obstetric risks or psychosocial risks present at birth. - Methods: Participants were 151 boys and 157 girls born at differing degrees of obstetric and psychosocial risk from a longitudinal study on a high-risk community sample. In infancy and childhood, NYLS-derived temperamental characteristics were assessed by a highly structured parent interview and standardized behavioral observations. At age 15 years, the Junior Temperament and Character Inventory/1218 was administered. - Results: Moderate correlations were found between Junior Temperament and Character Inventory scales in adolescence and NYLS-derived factors in childhood. The psychosocial risk load seemed to influence the expression of novelty seeking or corresponding NYLS-derived factors, whereas the obstetric risks did not contribute to variation in temperament. Our findings further support highly sex-specific gene x environment interactions on temperament in the developmental course. - Conclusion: The content of our NYLS-derived factors and the specific type of association across different temperament constructs fit into the increasing consensus regarding a small number of higher-order temperamental traits. (c) 2007 Elsevier Inc. All rights reserved.
Fixation durations in reading are longer for within-word fixation positions close to word center than for positions near word boundaries. This counterintuitive result was termed the Inverted-Optimal Viewing Position (IOVP) effect. We proposed an explanation of the effect based on error-correction of mislocated fixations [Nuthmann, A., Engbert, R., & Kliegl, R. (2005). Mislocated fixations during reading and the inverted optimal viewing position effect. Vision Research, 45, 2201-2217], that suggests that the IOVP effect is not related to word processing. Here we demonstrate the existence of an IOVP effect in "mindless reading", a G-string scanning task. We compare the results from experimental data with results obtained from computer simulations of a simple model of the IOVP effect and discuss alternative accounts. We conclude that oculornotor errors, which often induce mislocalized fixations, represent the most important source of the IOVP effect. (c) 2006 Elsevier Ltd. All rights reserved.