Age and skilled performance: contributions of working memory and processing speed

In this study, we examined the interrelationships among age, working memory (WM), processing speed, and the development of skilled performance. Younger (M=20.5) and older (M=68.9) adults were trained on an alphabet arithmetic task (Haider & Frensch, 1996) administered across three consecutive days. Although older adults were slower than younger adults, both age groups' response latencies decreased as a result of practice. Contrary to expectations, WM and processing speed were significantly correlated with performance late in training. Partial correlations suggested that age differences in performance at the end of training were mediated by individual differences in cognitive processing speed.     

Distinguishing indeterminate belief from “risk-averse” preferences

I focus my discussion on the well-known Ellsberg paradox. I find good normative reasons for incorporating non-precise belief, as represented by sets of probabilities, in an Ellsberg decision model. This amounts to forgoing the completeness axiom of expected utility theory. Provided that probability sets are interpreted as genuinely indeterminate belief (as opposed to “imprecise” belief), such a model can moreover make the “Ellsberg choices” rationally permissible. Without some further element to the story, however, the model does not explain how an agent may come to have unique preferences for each of the Ellsberg options. Levi (1986, Hard choices: Decision making under unresolved conflict. Cambridge, New York: Cambridge University Press) holds that the extra element amounts to innocuous secondary “risk” or security considerations that are used to break ties when more than one option is rationally permissible. While I think a lexical choice rule of this kind is very plausible, I argue that it involves a greater break with xpected utility theory than mere violation of the ordering axiom.     

Active avoidance conditioning in zebrafish (Danio rerio)

The zebrafish represents a potentially useful organism for studying genes involved in learning and memory function in vertebrates, because a number of genetic techniques in zebrafish have been developed to produce a wide variety of genetic mutants. While zebrafish mutants are being developed, behavioral studies on learning and memory function in zebrafish are in urgent need. The present study investigated active avoidance conditioning in normal zebrafish. Zebrafish were trained to swim from a lighted (CS) compartment to a dark compartment to avoid an electrical body shock (US) in a shuttle-box that consisted of a water-filled tank separated by an opaque barrier into two equal compartments. By varying the number of trials per training session and the duration of the intertrial interval, Experiments 1 and 2 showed that, with the CS, US, and intertrial interval being 12s, zebrafish learned avoidance responses within a training session consisting of 30 trials and retained the avoidance responses. Experiment 3 showed that zebrafish learned avoidance responses following the association between the CS of light and the US of shock in the avoidance conditioning paradigm. Using the avoidance conditioning paradigm, Experiment 4 investigated the amnestic effects of N-methyl-D-aspartate receptor antagonist MK-801 and nitric oxide synthase inhibitor L-NAME in zebrafish. Experiment 4 showed that post-training injection of L-NAME significantly impaired retention of avoidance responses while MK-801 did not, confirming previous results with other vertebrates. The results of the present study suggest the similar involvements of neurochemicals in learning and memory among vertebrates. Thus, future studies with zebrafish mutants may identify genes involved in learning and memory in vertebrates.     

The contributory role of worry in emotion generation and dysregulation in generalized anxiety disorder

The role of worry in generalized anxiety disorder (GAD) has been posited to serve as an avoidance of emotional experience, and emotion regulation deficits in GAD have been found in several previous studies. It remains unclear whether those with GAD experience more dysregulated emotions during periods of euthymia and positive affect or whether these deficits occur only during periods of worry. Individuals with GAD (with and without co-occurring dysphoria) and non-anxious controls were randomly assigned to receive a worry, neutral, or relaxation induction. Following the induction, all participants viewed a film clip documented to elicit sadness. Intensity of emotions and emotion regulation were examined following the induction period and film clip. The results revealed that, regardless of co-occurring dysphoria, individuals with GAD in the worry condition experienced more intense depressed affect than GAD participants in the other conditions and controls participants. In contrast, presence of worry appeared to have less impact on indices of emotion dysregulation, which were greater in participants with GAD compared to controls, but largely insensitive to contextual effects of worry or of relaxation. Following film viewing, both GAD participants with and without dysphoria displayed poorer understanding, acceptance, and management of emotions than did controls. However, acceptance and management deficits were most pronounced in individuals with both GAD and co-occurring dysphoria. Implications for the role of emotions in conceptualization and treatment of GAD are discussed.     

The Erotic Eucharist

Pope Benedict XVI's encyclical Deus Caritas Est continues the magisterium's twentieth‐century shift from an act‐oriented, procreative approach to sexual ethics to what I will term a heterosexually personalistic one. Situating a heterosexual anthropology within a heterosexual cosmology, Benedict argues that just as God loves humanity with heterosexual eros, so must human beings love each other heterosexually. Although Benedict depends upon the explanatory power of heterosexuality, he perhaps unwittingly ends up depicting God's love not as iconically heterosexual, but as queer. In casting God's love as queer, I do not, even analogously, impute to God a type of homosexuality as Benedict does a heterosexuality. Instead, by drawing attention to the discursive specificity and historical instability of both homosexuality and heterosexuality, I use “queer” to recognize God's love as beyond categorization and as strange; it cannot be corralled into or contained by the historically specific notions of heterosexual and homosexual. But this essay does not merely deconstruct Benedict's heterosexually personalistic cosmology. It uncovers in Benedict's Eucharistic transfiguration of marital love a new and promising way of situating discussions about the ethics of sex.     

The Role of Hostile and Benevolent Sexism in Women's and Men's Perceptions of the Menstruating Woman

Perceptions of menstruating women were studied in a sample of 244, predominantly European American, college freshmen. Both women and men rated the menstruating woman, as compared with the average woman, as higher on the Neuroticism factor from Lippa's (1991) measure of the Big Five personality factors. Men also rated her as lower on the Openness, Agreeableness, and Conscientiousness factors, and women rated her lower on the Extraversion factor. Women rated her as perceiving herself as less masculine and more feminine. Both women and men rated her as less "energized" and "sexy," but more "irritable,""sad," and "angry." In addition, men rated her as less "clean and fresh,""nurturing," and "reasonable," and more "spacey" and "annoying." Significant relationships were found between negative impressions of the menstruating woman and the Hostile Sexism Scale ( Glick & Fiske, 1996 ). Although most ratings by men and women were negative, women perceived the menstruating woman as more "maternal,""strong," and "trustworthy."     

Caring for Someone with Depression: Attitudes and Clinical Practices of Australian Mental Health Workers

Many people who support a person with depression report struggling with the carer role and being dissatisfied with the inclusivity and lack of support provided by clinicians. However, little is known about what influences the support provided to Australian carers of people with depression. To investigate this, 119 Australian mental health workers completed a self‐report questionnaire to gather information on their attitudes towards, barriers experienced and current clinical practices when working with carers of people with depression. Participants' attitudes towards family members and carers were generally positive. Reported inclusive clinical practices varied. Participants identified a number of barriers to inclusive practice that were predominantly organisational in nature. Participants who perceived more barriers reported providing more clinical interventions. Attitudes and barriers were associated with the inclusive clinical practice of participants who worked with mental health consumers, but not participants who worked with family members and carers. Even among this sample of self‐selecting clinicians, there was room for significant improvement in rates of carer inclusive practice. Further research should explore not only what inhibits but also what enables the participation of family members and carers in the care and treatment process for people with depression.