Aging effects on memory encoding in the frontal lobes

Functional magnetic resonance imaging (fMRI) was used to compare frontal-lobe activation in younger and older adults during encoding of words into memory. Participants made semantic or nonsemantic judgments about words. Younger adults exhibited greater activation for semantic relative to nonsemantic judgments in several regions, with the largest activation in the left inferior frontal gyrus. Older adults exhibited greater activation for semantic judgments in the same regions. but the extent of activation was reduced in left prefrontal regions. In older adults, there was a significant association between behavioral tests of declarative and working memory and extent of frontal activation. These results suggest that age-associated decreases in memory ability may be due to decreased frontal-lobe contributions to the initial encoding of experience.     

Directed Convergence in Stable Percept Acquisition

We view a perceptual capacity as a nondeductive inference, represented as a function from a set of premises to a set of conclusions. The application of the function to a single premise to produce a single conclusion is called a "percept" or "instantaneous percept." We define a stable percept as a convergent sequence of instantaneous percepts. Assuming that the sets of premises and conclusions are metric spaces, we introduce a strategy for acquiring stable percepts, called directed convergence. We consider probabilistic inferences, where the premise and conclusion sets are spaces of probability measures, and in this context we study Bayesian probabilistic/recursive inference. In this type of Bayesian inference the premises are probability measures, and the prior as well as the posterior is updated nontrivially at each iteration. This type of Bayesian inference is distinguished from classical Bayesian statistical inference where the prior remains fixed, and the posterior evolves by conditioning on successively more punctual premises. We indicate how the directed convergence procedure may be implemented in the context of Bayesian probabilistic/recursive inference. We discuss how the L(infinity) metric can be used to give numerical control of this type of Bayesian directed convergence. Copyright 2001 Academic Press.     

Pastoral care in psychiatric crisis

Pastoral Psychology -     

Mechanical perturbation of the wrist during one-handed catching

In the present study, the co-ordination of grasp and transport components of one-handed catching was examined following mechanical perturbations applied to the wrist. Six skilled catchers (mean age = 27.5 years) performed 64 trials in which tennis balls were projected at approximately 8 ms-1. The trial blocks consisted of 10 non-perturbed trials (NPTs) (baseline), and a block of 54 trials of which 20 trials were perturbed. The perturbation was in the form of a resistive force (12 N) applied via a piece of cord attached to a mechanical brake. In baseline trials participants reached maximal wrist velocity closer to the time of hand-ball contact (237 ms +/- 68) than in the perturbed (309 ms +/- 61) condition. Furthermore the wrist velocity profile of five out of six participants exhibited a double peak immediately after a perturbation. However, aperture variables such as the relative moment of final hand closure (approximately 70% of overall movement time) were not typically affected. The stability of grasp and transport coupling for one-handed catching was shown to vary from trial to trial. Skilled performers exploited redundant degrees of freedom in the motor system when faced with a sudden, unexpected change in task constraints.     

Children's conceptions of characteristic features of category members

The authors investigated children's conceptions of the characteristic features of category members and found that their conceptions underwent qualitative developmental changes. They hypothesized that (a) children initially tend to perceive category members in terms of individual characteristics (i.e., internal dispositions and behavioral patterns) and (b) only later do they conceive of category members in terms of their shared beliefs and values. They explored these hypotheses in 2 studies: In Study 1, they investigated how Protestant and Catholic children in Northern Ireland understood the religious intergroup context in their own country; in Study 2, children in Italy were presented with a fictional scenario of intergroup conflict and asked to explain the causes of the conflict. The results of both studies confirmed the 2 hypotheses.     

The phenomenology of real and illusory tip-of-the-tongue states

The tip-of-the-tongue state (TOT) is the phenomenological experience that a word is on the verge of being recalled. Most research has been directed at TOT etiology and at retrieval processes occurring during a TOT. In this study, TOT phenomenology was examined. In Experiment 1, strong TOTs were more likely than weak TOTs to be followed by correct recognition, and resolution (later recall) of TOTs was higher for strong than for weak TOTs, but only for commission errors. In Experiment 2, emotional TOTs were more likely to be resolved and recognized than nonemotional TOTs. In Experiment 3, imminence was defined as the feeling that retrieval is about to occur. Imminent TOTs were more likely to be followed by resolution and recognition than were nonimminent TOTs. Illusory TOTs (TOTs for unanswerable questions) tended to be weaker, less emotional, and less imminent than TOTs for answerable questions.     

Engagement With Self‐Practice/Self‐Reflection as a Professional Development Activity: The Role of Therapist Beliefs

A number of research studies support self‐practice/self‐reflection (SP/SR) as an experiential learning process that facilitates the acquisition of therapeutic skill in a number of cognitive‐behavioural therapy (CBT) competencies and as showing potential as a valuable professional development activity. Engaging therapists to participate in SP/SR programmes is sometimes difficult, and when they are offered the option to participate in SP/SR programmes as part of professional development, relatively few volunteer. This study investigates the role of therapist beliefs about SP/SR as a potential obstacle to engagement. An online survey was developed to assess the strength of 14 commonly held therapist beliefs concerning the consequences of participating voluntarily in a SP/SR programme. Participants were a combined sample of 44 Psychological Wellbeing Practitioners and high‐intensity CBT therapists employed by an Improving Access to Psychological Therapies service in the United Kingdom. Few negative beliefs about SP/SR emerged. The majority of respondents believed SP/SR programmes were relevant to their work situation, but perceived “lack of time” as a significant barrier to participation. Three factors are considered in relation to introducing SP/SR as a workforce professional development activity: (a) The importance of managing therapist perceptions regarding time; (b) SP/SR as a mechanism to increase self‐care and reduce burnout; and (c) The need to focus mental health services' attention on the potential of SP/SR programmes to increase staff morale and improve service delivery.     

Spontaneous Self‐Practice of Cognitive Behavioural Therapy (CBT) by Aboriginal Counsellors During and Following CBT Training: A Retrospective Analysis of Facilitating Conditions and Impact

Previous cognitive behavioural therapy (CBT) training studies have suggested that therapists who practice CBT strategies on themselves during training may experience professional and personal benefits. However, it has also been reported that some CBT trainees are reluctant to engage in self‐practice. The present study reports an incidental finding from a CBT training study with Aboriginal counsellors: all five counsellors reported that they practiced CBT techniques on themselves without specific encouragement by the trainers to do so. This paper therefore posed three questions: (a) Why—in contrast to some other trainees—did this group choose to apply CBT to themselves? (b) How did they apply it—with what purpose, in what contexts, and which skills? (c) What was the impact of CBT self‐practice? Data from the group's reflections were qualitatively analysed by two of the researchers, and “member checked” by the remainder. Results indicated that the counsellors were motivated to practice CBT on themselves for two principal reasons: the value they placed on CBT, and their personal need resulting from the high number of crises experienced while living and working in their communities. The counsellors reported practicing CBT in a wide variety of contexts as part of their learning. As in previous studies, the impact of CBT self‐practice was that it increased their confidence and competence as therapists. It also appeared to be a valuable burnout prevention strategy. If the results are generalisable, they suggest that self‐experiential training in CBT may be a culturally responsive and adaptive way for Aboriginal counsellors to enhance their learning of CBT skills.