Neurotic Nucleus and Test Anxiety

Undergraduate university students (N = 103) participated in a study of the relationship between test anxiety and the variables of trait anxiety, self-esteem, locus of control, mental ability, and gender. Results indicated bivariate associations between total test anxiety and the other measures except for mental ability. Further analyses revealed independent relationships between the “worry” component of test anxiety and the variables of trait anxiety, intemality, chance, and mental ability. We also found independent associations between the “emotionality” aspect of test anxiety and the measures of trait anxiety and chance.     

Henri Bergson: Evolution,time and philosophy

Evolutionary theory is hindered by the conflict between the apparently antagonistic principles of its two founding figures, Darwin and Lamarck. Bergson's Creative Evolution outlines the means of transcending this impasse. If the evolutionary process is conceived as enduring then the atomistic model of static genetic states is never fully realisable. In the light of this, Bergson considers the germ‐plasm to be essentially “fluid.” If there is to be influence on the germ‐line it will be primarily in terms of the manner in which the genetic data is unfolded. In order to designate this influence Bergson introduces the concept of the “tendency.” The tendency will be explicated in relation to contemporary evolutionary biology. However, as the concept signifies that which is given only in the duration in which information is elaborated, it is precluded from representation. Bergson demonstrates that it is the evolutionary principle of continuous transformation which constitutes the limit to any scientific of view. For this reason, science needs to be complemented by a philosophical account of the duration of process.     

Essentializing differences between women and men

People represent many social categories, including gender categories, in essentialist terms: They see category members as sharing deep, nonobvious properties that make them the kinds of things they are. The present research explored the consequences of this mode of representation for social inferences. In two sets of studies, participants learned (a) that they were similar to a member of the other gender on a novel attribute, (b) that they were different from a member of the other gender on a novel attribute, or (c) just their own standing on a novel attribute. Results showed that participants made stronger inductive inferences about the attribute in question when they learned that it distinguished them from a member of the other gender than in the other conditions. We consider the implications of these results for the representation of social categories and for everyday social inference processes.     

Power in randomized group comparisons: the value of adding a single intermediate time point to a traditional pretest-posttest design

Adding a pretest as a covariate to a randomized posttest-only design increases statistical power, as does the addition of intermediate time points to a randomized pretest-posttest design. Although typically 5 waves of data are required in this instance to produce meaningful gains in power, a 3-wave intensive design allows the evaluation of the straight-line growth model and may reduce the effect of missing data. The authors identify the statistically most powerful method of data analysis in the 3-wave intensive design. If straight-line growth is assumed, the pretest-posttest slope must assume fairly extreme values for the intermediate time point to increase power beyond the standard analysis of covariance on the posttest with the pretest as covariate, ignoring the intermediate time point.     

Defensiveness and symptom reporting

This investigation examined whether high levels of defensiveness were associated with lower levels of reporting symptoms of ill health. Participants completed questionnaires measuring defensiveness, trait anxiety (neuroticism), and health. Analyses revealed that overall high defensiveness was significantly associated with lower levels of symptom reporting, and that among individuals high in neuroticism (a trait normally associated with high levels of symptom reporting), those individuals also high in defensiveness reported significantly lower levels of symptoms. The results suggest that defensiveness may act as a buffer against the perception and reporting of the symptoms of illness.     

Treatment with medications affecting dopaminergic and serotonergic mechanisms: effects on fluency and anxiety in persons who stutter

Medications with dopamine antagonist properties, such as haloperidol, and those with serotonin reuptake inhibitor properties, such as clomipramine, have been shown to improve fluency. To examine the degree to which each of these two pharmacological mechanisms might independently affect fluency, a selective serotonin reuptake inhibitor, paroxetine, and a selective dopamine (D-2) antagonist, pimozide, were evaluated. Both types of medications also affect mood and anxiety, factors that could influence fluency levels. Therefore, we also evaluated the medications’ effects on generalized and speech-related anxiety and the relationships between changes in anxiety and changes in fluency in 11 subjects with a history of developmental stuttering. The randomized, double blind, placebo-controlled crossover study that was designed had to be terminated prior to completion due to severe side effects following withdrawal from paroxetine. Even with a reduced sample size (n = 6), significant improvement in percent fluent speaking time (p = 0.02) was found using a telephone task between baseline and pimozide (n = 6), with average duration of dysfluencies significantly shorter (p = 0.04) but no significant difference in the estimated number of dysfluencies per minute. This significant improvement was associated with non-significant increases in generalized anxiety, but non-significant decreases in speech-related anxiety. No significant differences were found in fluency between baseline and paroxetine (n = 5). These preliminary results suggest that fluency improvement is more likely to be mediated by dopaminergic rather than serotonergic mechanisms. Due to its side effects, however, pimozide may be considered a risk for treatment of stuttering.

Educational objectives: As a result of reading this paper the reader will describe and explain: (1) how medications may affect fluency and the rationale for selecting medications for treatment trials; (2) the interrelationship between fluency and anxiety; and (3) factors important in developing clinical trials using medications.     

Genetic enhancement: plan now to act later

All three main articles in the issues of the Kennedy Institute of Ethics Journal endorse the view that genetic enhancement should be permitted, including human germ-line genetic enhancement. However, unregulated, wealth-based access to genetic enhancement in general, and germ-line enhancement in particular, would create intolerable risks for society. Although there are a number of practical problems raised by proposals to regulate or restrict access to genetic enhancement, which will make it difficult if not impossible to muster support for any effective restrictions until we begin to experience the societal problems that genetic enhancement will create, it is important to consider now what restrictions would be appropriate, how they would be imposed, and what changes would be needed in existing laws and institutions to facilitate them. Without this type of groundwork, there is no way society will be in a position to act in time.     

The role of motion direction selective extrastriate regions in reading: a transcranial magnetic stimulation study

Why reading ability is correlated with motion processing ability is perplexing. Activity in motion direction processing regions (Area V5/MT+) was perturbed by means of repetitive transcranial magnetic stimulation (rTMS) to examine its effect on reading. A functional probe (significant shortening of the motion aftereffect) was used to identify Area V5/MT+. Right-handed participants (8 m, 8 f) received three 7.5 min blocks of rTMS, after which two phonological and one orthographic reading tasks were administered. Application of rTMS to Area V5/MT+ (as compared to a non-rTMS baseline) significantly decreased performance only during non-word naming. The pattern of naming errors and the absence of deficits on the second phonological task were not consistent with a role for Area V5/MT+ in phonological decoding. Instead, its role in reading may be limited to image stabilization and/or letter localization.