Differences in feedback- and inhibition-related neural activity in adult ADHD

The objective of this study was to examine response inhibition- and feedback-related neural activity in adults with attention deficit hyperactivity disorder (ADHD) using event-related functional MRI. Sixteen male adults with ADHD and 13 healthy/normal controls participated in this study and performed a modified Go/NoGo task. Behaviourally, attention and inhibition problems in the ADHD group were observed; no feedback-related differences between the groups were detected. The neuroimaging data showed that the ADHD group displayed more activation in the inferior frontal gyrus and putamen during response inhibition. During feedback-related processes, the ADHD group displayed less activation in the inferior frontal/orbitofrontal cortex, hippocampus/nucleus accumbens, and caudate nucleus, but more activity in the inferior frontal gyrus. These results indicate that at least two distinguishable underlying brain networks related to response inhibition and feedback are altered in adults with ADHD.     

HIV, Cognition and Women

Although the incidence of HIV in the United States is higher among men compared to women, the global proportion of women versus men who are infected has been approximately 50% since the late 1990s. Women have been under-represented in neuropsychological studies of HIV. A small number of studies have reported a significantly higher prevalence of neurocognitive impairment among HIV+ women compared to HIV− controls regardless of symptom status and with or without an AIDS diagnosis. Impairment was most evident on psychomotor tasks. The risk of neuropsychological impairment was increased among HIV+ women not on antiretroviral therapy. Age and depressive symptoms also increase neurocognitive risk. New neurocognitive studies of ovarian steroid hormones, PTSD and other psychiatric conditions are critical for addressing potential female-specific aspects of HIV-Associated Neurocognitive Disorder. Such studies will also address questions regarding involvement of the hippocampus and verbal memory, which may be of particular significance among HIV+ women.

The Myth of Closure

Therapies for grief and loss have traditionally focused on the work of grieving. The goal was to reach an endpoint, now popularly called closure. There are, however, many people who, through no fault of their own, find a loss so unclear that there can be no end to grief. They have not failed in the work of grieving, but rather have suffered ambiguous loss, a type of loss that is inherently open ended. Instead of closure, the therapeutic goal is to help people find meaning despite the lack of definitive information and finality. Hope lies in increasing a family's tolerance for ambiguity, but first, professionals must increase their own comfort with unanswered questions. In this article, the authors, one a poet, the other a family therapist and theorist, offer a unique blending of theory, reflection, and poetry to experientially deepen the process of self‐reflection about a kind of loss that defies closure.     

Valence-specific laterality effects in vocal emotion: interactions with stimulus type, blocking and sex

Valence-specific laterality effects have been frequently obtained in facial emotion perception but not in vocal emotion perception. We report a dichotic listening study further examining whether valence-specific laterality effects generalise to vocal emotions. Based on previous literature, we tested whether valence-specific laterality effects were dependent on blocked presentation of the emotion conditions, on the naturalness of the emotional stimuli, or on listener sex. We presented happy and sad sentences, paired with neutral counterparts, dichotically in an emotion localisation task, with vocal stimuli being preceded by verbal labels indicating target emotions. The measure was accuracy. When stimuli of the same emotion were presented as a block, a valence-specific laterality effect was demonstrated, but only in original stimuli and not morphed stimuli. There was a separate interaction with listener sex. We interpret our findings as suggesting that the valence-specific laterality hypothesis is supported only in certain circumstances. We discuss modulating factors, and we consider whether the mechanisms underlying those factors may be attentional or experiential in nature.     

Book reviews

Eero Riikonen and Gregory Madan Smith (1997) Re-Imagining Therapy: Living Conversations and Relational Knowing, London: Sage, $14.99

Shulamit Ramon (1996) Mental Health in Europe: Ends, Beginnings and Rediscoveries, London: Mind, $12.99

Re:Public (eds) (1998) Planet Diana: Cultural Studies and Global Mourning, Kingswood, NSW: Research Centre in Intercommunal Studies, University of Western Sydney Nepean, pp. vii + 163, Aus$22

Lucy Yardley (ed.) (1997) Material Discourses of Health and Illness, London and New York: Routledge, pp. 256, $14.99 (pb), $45.00 (hb)

J.H. Berke, S. Pierides, A. Sabbadini and S. Schneider (1998) Even Paranoids Have Enemies, London: Routledge, $15.99

Hans W. Cohn (1997) Existential Thought and Therapeutic Practice, London: Sage, pp. 135, $11.99 (pb), $29.99 (hb)     

Consistent egoists and situation managers: two problems for situationism

According to philosophical “situationism”, psychological evidence shows that human action is typically best explained by the influence of situational factors and not by “global” and robust character traits of the agent. As a practical implication of their view, situationists recommend that efforts in moral education be shifted from character development to situation management. Much of the discussion has focused on whether global conceptions of virtue and character, and in particular Aristotelian virtue ethics, can be defended against the situationist challenge. After several rounds of debate, both sides claim victory, and they seem to have reached a stalemate. In this paper, I refocus the debate on the arguments offered in support of situationism itself. I argue that two serious problems have so far gone unnoticed in the literature. First, the argument in support of situationism is unsound. It is based on evidence that agents’ morally relevant behavior reliably covaries with morally irrelevant situational variables. Using the example of egoism, I show that this evidence does not warrant the situationist inference because the evidence permits a plausible alternative interpretation. Second, I argue that the situationists’ advocacy of situation management is at odds with their core thesis because situation management requires exactly the type of agency they reject as unrealistic.     

Coping Mechanisms of Unemployed African Men with Dependents

The primary objective of the study was to evaluate the efficiency of the coping mechanisms of 82 unemployed African men with dependents. Results revealed significant relationships between perceived stress and stressful life events, as well as between perceived stress and four groups of coping mechanisms, the strongest relationships being reported for stressful life events, psychological coping resources, and family resources. Only four of the fifteen identified coping mechanisms could reduce the relationship between stressful life events and perceived stress. These were an internal locus of control, extended family social support, mastery and health within the family, and the utilization of community resources.     

The impact of body-part-naming training on the accuracy of imitative performances in 2- to 3-year-old children

A series of three experiments explored the relationship between 3-year-old children's ability to name target body parts and their untrained matching of target hand-to-body touches. Nine participants, 3 per experiment, were presented with repeated generalized imitation tests in a multiple-baseline procedure, interspersed with step-by-step training that enabled them to (i) tact the target locations on their own and the experimenter's bodies or (ii) respond accurately as listeners to the experimenter's tacts of the target locations. Prompts for on-task naming of target body parts were also provided later in the procedure. In Experiment 1, only tact training followed by listener probes were conducted; in Experiment 2, tacting was trained first and listener behavior second, whereas in Experiment 3 listener training preceded tact training. Both tact and listener training resulted in emergence of naming together with significant and large improvements in the children's matching performances; this was true for each child and across most target gestures. The present series of experiments provides evidence that naming--the most basic form of self-instructional behavior--may be one means of establishing untrained matching as measured in generalized imitation tests. This demonstration has a bearing on our interpretation of imitation reported in the behavior analytic, cognitive developmental, and comparative literature.     

The effect of an extinction cue on ABA-renewal: Does valence matter?

The present human fear conditioning study examined whether the valence of an extinction cue has a differential effect on attenuating renewal that is induced by removal of the extinction context. Additionally, the study aimed to assess whether such attenuating effect is based on a modulatory or safety-signal role of the cue. In acquisition, extinction, and test stages of the experiment, human participants received pairings of human faces, presented against a particular background color, with the presence or absence of an aversive auditory stimulus. Experimental groups differed in the valence of a cue that was presented during extinction, in whether or not extinction took place against a different background color than present during acquisition and testing, and in whether the extinction cue was present or absent at test. The conditioned response consisted of auditory-stimulus expectancy ratings. It was hypothesized that a positively valued extinction cue yields faster extinction, stronger attenuation of renewal, and better transfer of its inhibitory power to non-extinguished stimuli than a negatively valued cue. All three hypotheses were confirmed, suggesting that the positive, but not the negative, cue had become a safety signal. The results were discussed in the framework of extinction-based exposure treatments.     

The Trauma and Complicated Grief of Ambiguous Loss

Ambiguous loss is a newly identified type of loss that occurs when a loved one is physically present, but psychologically absent. Dementia is just one example. Because the lost person is here, but not here, grief is frozen, life is put on hold, and people are traumatized. With no official verification of death, no possibility of closure, and no rituals for support, there is no resolution of grief (Boss 1999). Clergy, especially pastoral counselors, can witness and provide comfort for such uncanny loss because people rely on them for support, not just from the clear loss of death, but from the ambiguous losses, catastrophic and ordinary, that inevitably will occur across the life course.