Lifespan differences in cortical dynamics of auditory perception

Using electroencephalographic recordings (EEG), we assessed differences in oscillatory cortical activity during auditory‐oddball performance between children aged 9–13 years, younger adults, and older adults. From childhood to old age, phase synchronization increased within and between electrodes, whereas whole power and evoked power decreased. We conclude that the cortical dynamics of perceptual processing undergo substantial reorganization from childhood to old age, and discuss possible reasons for the inverse relation between age trends in phase synchronization and power, such as lifespan differences in neural background activity, or a lifespan shift from rate coding in children to temporal coding in adults.     

Betreuungsrecht

Patient care comprises all measures for legally settling the affairs of persons unable to do so due to illness or physical handicap. Honourary or professional custodians appointed by the guardianship court [Vormundschaftsgericht; in the future: Betreuungsgericht, care court] perform the duties for their charges as determined by the court.  The care legislation passed in 1992 was revised several times, both structurally and fundamentally. With the latest changes, which were made on 18.06.2009 and will come into force on 01.09.2009, basics of the living will were incorporated into the law. Serious decisions as to whether medical assistance shall be given or withheld can thenceforth be made by the guardianship court.     

Coping responses by adults who stutter: Part I. Protecting the self and others

Using a grounded theory approach, four clusters were identified that represent patterns of coping by adults who stutter. In order to understand the complexities within the coping responses of speakers to the experience of stuttering, this first of two companion papers summarizes the literature on the human coping response to stress and the nature of two of the four main findings identified. These findings describe a coping process that emphasizes strategies of protecting both the speaker and the listener from experiencing discomfort associated with stuttering. The companion paper describes the remaining two main findings that emphasize the characteristics of self-focused and action oriented coping responses.Educational Objectives: The reader will be able to: (1) describe, from the perspective of a select group of adults who stutter, the themes associated with the process of coping with stuttering, (2) describe the basic rationale for the procedures associated with grounded theory methods, (3) describe the factors that influence the choice to use emotion-focused and problem-focused coping strategies, and (4) explain the factors that contribute to the use of methods of escape.     

Psychological Reactance in College Students: Family‐of‐Origin Predictors

This study examined the relationship between psychological reactance and dimensions of functioning in the family of origin. Psychological reactance is the tendency to exhibit resistance in relation to one's freedoms being restricted. Three hundred par ticipants completed the Therapeutic Reactance Scale (E. T. Dowd, C. R. Milne, & S. L. Wise, 1991), the Family Environment Scale (R. H. Moos & B. S. Moos, 1986), and demographic questions. Results showed that 5 family dimensions (i.e., cohesion, conflict, moral‐religious emphasis, independence, and achievement orientation) significantly predicted psychological reactance. Results also showed that college students from divorced families were more psychologically reactant than students from intact families. Implications of these results for counselors and for future researchers are provided.     

Beliefs About the Disconfirmability of Stereotypes: The Stereotype Disconfirmability Effect1

Two studies examined people's beliefs about the relative disconfirmability of out‐group and in‐group stereotypes. In Study 1 (n= 56), Hispanics and White non‐Hispanics judged the in‐group and out‐group stereotypes in terms of the ease with which they could be dis‐confirmed. The results indicated that strongly, ethnically identified participants believed the out‐group stereotype to be more difficult to disconfirm than the in‐group stereotype. The second study with 73 White participants examined their beliefs about the disconfirmability of the White and African American stereotypes. The results indicated that participants higher in prejudice believed the African American stereotype is more difficult to disconfirm than the White stereotype to a greater degree than participants lower in prejudice. The results suggest that disconfirmability beliefs comprise a distinct construct thai may contribute to the difficulty of changing out‐group stereotypes.     

A Light Theory of Color

Traditional theories locate color in primary qualities of objects, indispositional properties of objects, in visual fields, or nowhere. Incontrast, we argue that color is located in properties of light. Morespecifically, light is red iff there is a property P of the lightthat typically interacts with normal human perceivers to give thesensation of red. This is an error theory, because objects and visualfields that appear red are not really red, since they lack theproperties that make light red. We show how this light theory solvesor avoids problems that afflict its competitors.     

The Nootropic Properties of Ginseng Saponin Rb1 are Linked to Effects on Anxiety

Previous studies have shown that crude ginseng extracts enhance performance on shock-motivated tasks. Whether such performance enhancements are due to memory-enhancing (nootropic) properties of ginseng, or to other non-specific effects such as an influence on anxiety has not been determined. In the present study, we evaluated both the nootropic and anxiolytic effects of the ginseng saponin Rb1. In the first experiment, 80 five-day-old male chicks received intraperitoneal injections of 0, 0.25, 2.5 or 5.0 mg/kg Rb1. Performance on a visual discrimination task was evaluated 15 minutes, 24 and 72 hours later. Acquisition of a visual discrimination task was unaffected by drug treatment, but the number of errors was significantly reduced in the 0.25 mg/kg group during retention trials completed 24 and 72 hours after injection. Animals receiving higher dosages showed trends towards enhancement initially, but demonstrated impaired performance when tested 72 hours later. Rb1 had no effect on response rates or body weight. In the second experiment, 64 five-day-old male chicks received similar injections of Rb1 (0, 0.25, 2.5 or 5.0 mg/kg) and separation distress was evaluated 15 minutes, 24 and 72 hours later. Rb1 produced a change in separation distress that depended on the dose and environmental condition under which distress was recorded. These data suggest that Rb1 can improve memory for a visual discrimination task and that the nootropic effect may be related to changes in anxiety.