Reductions in anxiety and improvements in teaching associated with cue-controlled relaxation training

This study examined the efficacy of cue-controlled relaxation, taught in three 2-hour workshops, in reducing the anxiety of two elementary school teachers. Anxiety was measured using direct observation of external behavior and self-report of internal states; and the effects of anxiety reduction on selected teaching behaviors were also examined. Following training, both teachers exhibited significant reductions in motoric manifestations of anxiety and in some self-reported internal states. Both teachers showed significant increases in rewarding behavior, and they reduced disapproving behavior to zero on most days. Even though results were not maintained following the treatment program, this study demonstrated that training in the self-management of stress and tension can significantly affect the anxiety and teaching behaviors of teachers.     

Developmental lead exposure has mixed effects on butterfly cognitive processes

While the effects of lead pollution have been well studied in vertebrates, it is unclear to what extent lead may negatively affect insect cognition. Lead pollution in soils can elevate lead in plant tissues, suggesting it could negatively affect neural development of insect herbivores. We used the cabbage white butterfly (Pieris rapae) as a model system to study the effect of lead pollution on insect cognitive processes, which play an important role in how insects locate and handle resources. Cabbage white butterfly larvae were reared on a 4-ppm lead diet, a concentration representative of vegetation in polluted sites; we measured eye size and performance on a foraging assay in adults. Relative to controls, lead-reared butterflies did not differ in time or ability to search for a food reward associated with a less preferred color. Indeed, lead-treated butterflies were more likely to participate in the behavioral assay itself. Lead exposure did not negatively affect survival or body size, and it actually sped up development time. The effects of lead on relative eye size varied with sex: lead tended to reduce eye size in males, but increase eye size in females. These results suggest that low levels of lead pollution may have mixed effects on butterfly vision, but only minimal impacts on performance in foraging tasks, although follow-up work is needed to test whether this result is specific to cabbage whites, which are often associated with disturbed areas.     

The Behavioral Avoidance Task with Anxious Youth: A Review of Procedures,Properties, and Criticisms

The measurement of avoidance behavior in youth with anxiety and related disorders is essential. Historically, the behavioral avoidance task (BAT) has been used as a measure of avoidance that can be tailored to a youth’s particular fear. Although in use for over 90 years, there has yet to be a systematic review of its use, properties, etc. Here we examine the use of the BAT with youth as a measure of avoidance over the past 30 years. Studies have used the BAT as a measure of treatment outcome, to explore theories related to avoidance, and provide evidence for the psychometric properties of phobia questionnaires. Specifically, we compare the results of these studies, the purposes of the BAT, and the types of data collected. Results indicated that the BAT might be particularly sensitive to treatment effects. Furthermore, youth with specific phobias can be expected to complete an average of 30% of the BAT at pre-treatment and 60% at post-treatment. These affects have generally been maintained at 6-month follow-ups. Measures of subjective units of distress (SUDS) proved more consistent than steps completed, but more resistant to treatment effects; researchers can expect a SUDS rating of approximately 55% at pre-treatment and 40% at post-treatment. We review the properties and procedures that are used within these studies and provide a critical review. Overall, the BAT is in need of a standardized procedure to allow for psychometric studies to provide evidence of the task’s reliability and validity.