Close encounters of the third order kind

This article describes an exercise developed for assessing trainee family therapists' practice at the end of a placement year in a manner consistent with the third‐order positioning the trainees were endeavouring to adopt in their practice. Evaluation by the trainees confirmed that the exercise had provided them with a significant opportunity to co‐construct with the supervisors their practice learning and future learning goals.     

Stress, Glucocorticoids, and Damage to the Nervous System: The Current State of Confusion

An extensive literature demonstrates that glucocorticoids (GCs), the adrenal steroids secreted during stress, can have a broad range of deleterious effects in the brain. The actions occur predominately, but not exclusively, in the hippocampus, a structure rich in corticosteroid receptors and particularly sensitive to GCs. The first half of this review considers three types of GC effects: a) GC-induced atrophy, in which a few weeks' exposure to high GC concentrations or to stress causes reversible atrophy of dendritic processes in the hippocampus; b) GC neurotoxicity where, over the course of months, GC exposure kills hippocampal neurons; c) GC neuroendangerment, in which elevated GC concentrations at the time of a neurological insult such as a stroke or seizure impairs the ability of neurons to survive the insult. The second half considers the rather confusing literature as to the possible mechanisms underlying these deleterious GC actions. Five broad themes are discerned: a) that GCs induce a metabolic vulnerability in neurons due to inhibition of glucose uptake; b) that GCs exacerbate various steps in a damaging cascade of glutamate excess, calcium mobilization and oxygen radical generation. In a review a number of years ago, I concluded that these two components accounted for the deleterious GC effects. Specifically, the energetic vulnerability induced by GCs left neurons metabolically compromised, and less able to carry out the costly task of containing glutamate, calcium and oxygen radicals. More recent work has shown this conclusion to be simplistic, and GC actions are shown to probably involve at least three additional components: c) that GCs impair a variety of neuronal defenses against neurologic insults; d) that GCs disrupt the mobilization of neurotrophins; e) that GCs have a variety of electrophysiological effects which can damage neurons. The relevance of each of those mechanisms to GC-induced atrophy, neurotoxicity and neuroendangerment is considered, as are the likely interactions among them.     

Orthographic learning via self-teaching in children learning to read English: effects of exposure, durability, and context

This experiment investigated orthographic learning via self-teaching in 8- and 9-year-olds learning to read English. Children were exposed to novel words, and following a 1- or 7-day delay interval, orthographic learning was assessed by asking children to select previously seen novel words from an array of visually and phonologically similar foils. Novel words were exposed either in meaningful text or in isolation, and number of exposures was manipulated with each novel word appearing once, twice, or four times. Learning increased as a function of number of exposures, although some evidence of durable one-trial learning was observed. Context played no role, suggesting that orthographic learning is not dependent on meaning-based information. In general, these findings offer support for the central aspects of Share's self-teaching hypothesis. However, although we observed a general relation between phonological decoding and orthographic learning, the relation did not hold at an item-by-item level of analysis, suggesting that a strong version of Share's item-based account is not correct.     

FURTHER EXPLORING THE RELATIONSHIP BETWEEN LOQUACITY AND CONSTRUCT DIFFERENTIATION

This report addressed the convergent validity of the RCQ provided by the Paragraph Completion Test, and discriminant validity information provided by the Talkaholic Scale. Eighty undergraduates enrolled in an introductory communication class at a large midwestern university completed three questionnaires. Correlations indicated that the RCQ and the Paragraph Completion Test were only slightly related ( r = .37, p < .0005). The RCQ and the Talkaholic scale were negligibly related. Weak relationships observed between construct differentiation and construct organization indicate the need for further research on factors that affect construct-differentiated people's ability to integrate social information.     

Titchener at Leipzig

Twenty grade 3 and 20 grade 6 children were asked to identify a concealed target word (e.g., Banana) on the basis of four successively presented related cues (e.g., “It's a fruit” “It comes in a bunch”). Grade 6 children were more adept at using multiple cues to retrieve the target words than were grade 3 children, although practically all of the latter seemed to have the skills to do so. Younger children's failure to check spontaneously the consistency of answers to later presented cues with attributes indicated by the preceding cues appears to be the major source of their poor performance on retrieval tasks involving multiple cues.