Speech motor programming in hypokinetic and ataxic dysarthria

It is widely accepted that the cerebellar and basal ganglia control circuits contribute to the programming of movement. Converging evidence from neuroimaging, limb control, and neuropsychological studies suggests that (1) people with cerebellar disease have reduced ability to program movement sequences in advance of movement onset and (2) people with Parkinson's disease are unable to maintain a programmed response or to rapidly switch between responses. Despite a substantial supporting literature, no studies have addressed these potential areas of speech programming disruption for speakers with ataxic and hypokinetic dysarthria. Control participants and adults with dysarthria completed speech reaction time protocols designed to capture these aspects of utterance preparation. Results provided initial support for processing deficits in speakers with ataxic and hypokinetic dysarthria that are separable from motor execution impairments.     

When good things go bad: the reflex physiology of defense

For humans, the threat of painful shock greatly potentiates the reflexive startle blink. Moreover, viewing unpleasant, compared with pleasant, pictures also prompts heightened startle reflexes, suggesting that the startle reflex indexes general defensive activation. In this study, pleasant or unpleasant pictures were used to signal shock threat in order to explore how previous affective associations modulate new defensive reactions. When cuing threat of shock, pleasant and unpleasant pictures prompted physiological profiles consistent with defensive activation, indicating that threat of shock renders previously pleasant cues aversive. For unpleasant pictures only, defensive startle was potentiated even when these cues signaled safety. Taken together, the data indicate that (a) regardless of their intrinsic affective meaning, cues signaling shock threat prompt somatic and autonomic reactions consistent with defense, and that (b) intrinsically unpleasant cues continue to prompt defensive activation even when the context of their presentation is specifically non-threatening.     

Expectations and Realizations: The Role of Expectancies in Achievement Settings

High expectancies of success are widely assumed to have positive effects on performance in achievement situations. However, previous investigations have tended to ignore task difficulty or assume that expectancies affect performance in a linear fashion. In two investigations, we found that (a) expectancies were more closely related to performance at difficult tasks than easy tasks and (b) low expectancies produced the poorest levels of performance, but moderate and high expectancies were equally advantageous. The practical, methodological, and theoretical implications of these findings are considered.This research was supported by a Presidential Young Investigator Award from the National Science Foundation (SBR-8958211) to Jonathon D. Brown, and a National Science Foundation graduate fellowship to Margaret A. Marshall.     

Life review therapy using autobiographical retrieval practice for older adults with depressive symptomatology

The aim of this study was to examine the efficacy of life review based on autobiographical retrieval practice for treating depressed older adults. Forty-three adults aged 65-93 with clinically significant depressive symptomatology and no dementia were randomly assigned to treatment or to no treatment. The results indicated significant differences between experimental and control groups after 4 weeks of autobiographical retrieval practice. At posttest, those in the treatment condition showed fewer depressive symptoms, less hopelessness, improved life satisfaction, and retrieval of more specific events. The findings suggest that practice in autobiographical memory for specific events may be among the components of life review that account for its effectiveness and could be a useful tool in psychotherapy with older adults.     

Test-retest reliability and construct validity of Contour Drawing Rating Scale scores in a sample of early adolescent girls

Test–retest and construct validity of Contour Drawing Rating Scale (CDRS) scores were examined in 1056 Grades 7 and 8 girls. Questionnaires were completed four times, including retests at 2, 6 and 14 weeks. Test–retest reliability for current size, ideal size and current–ideal discrepancy mostly exceeded 0.70 (0.65–0.87, for the full sample, with higher rs for shorter retest periods). Ideal and current size ratings increased slightly over time. High correlations between perceived current figure and measured body mass index; moderate rs between current–ideal discrepancy and body dissatisfaction and restrained eating; and very low or no significant correlations with social desirability supported construct validity in this group. The study supported the use of the CDRS in early adolescent girls.     

Suicidal ideation and attitudes toward suicide

Although hopelessness and depression are known risk factors for suicide, most individuals who are hopeless or depressed never make a suicide attempt. In this study, we tested the hypothesis that college students' (n = 230) attitudes toward suicide (the degree to which they see it as an acceptable option under some circumstances) would moderate the link between both hopelessness and depressive symptoms and their levels of suicidal ideation. This moderation hypothesis was supported, but only among men. Specifically, among men, levels of hopelessness and depressive symptoms were significantly related to suicidal ideation among only those with relatively positive attitudes toward suicide.     

Predictors of suicide ideation and depression in Hong Kong adolescents: perceptions of academic and family climates

The unique dimensions of perceptions of school and family contributing to depression and suicide ideation in Hong Kong adolescents were examined in two studies. In Study 1, among 327 Hong Kong Chinese female students ages 13-18, 47% reported some suicide ideation. Suicide ideation was significantly associated with depression, test anxiety, academic self-concept, and adolescents' perceived parental dissatisfaction with academic performance. The correlation between test anxiety and depression was especially high (r = .51). Study 2 examined how three different aspects of perceived family relationship were associated with depression and suicide ideation. Among 371 Hong Kong Chinese adolescents ages 14-20, 52.6% reported suicide ideation. Low levels of family cohesion and support and high levels of parent-adolescent conflict were positively related to depression and suicide ideation in both genders. Across both studies, depression mediated associations between academic- and family-related variables and suicide ideation. Findings underscore the importance of both academic and family climate in understanding depression and suicide ideation among Chinese adolescents.     

Cognitive capacities of older adults who are asked to consent to medical treatment or to clinical research

Knowledge about cognitive changes characteristically found in older adults provides necessary context for administering consent procedures. It should neither be assumed that most adults over a certain age are too demented to consent nor that decision-making is approached the same way by younger and older adults.     

Personality and risk of cognitive impairment 25 years later

The authors examined the relationship between personality and cognitive impairment in 4,039 members of the Swedish Twin Registry. Neuroticism and extraversion scores were collected in 1973 at midlife, and cognitive impairment was assessed in the same group 25 years later. Data were analyzed with case-control and co-twin control designs. Greater neuroticism was associated with higher risk of cognitive impairment in the results from case-control, but not from co-twin, analyses. Compared with both extraversion and introversion, moderate extraversion was associated with lower risk of cognitive impairment in both case-control and co-twin designs, as was the combination of high neuroticism and low extraversion. Findings are discussed in the context of theories related to personality, psychological distress, arousal, and cognitive function.