Luther and Justification

In this article, I reflect on Luther's doctrine on justification as it came out in different ways in some of his seminal writings between 1518 and 1538, all represented in volume 2 of The Annotated Luther. Discovering the righteousness of God as something already given to humans opened fundamentally new perspectives to Luther.     

The impact of environmental experiences on symptoms of anxiety and depression across the life span

Symptoms of anxiety and depression are relatively stable over time. Can this stability be explained by genetic influences, or is it caused by the long-lasting effects of accumulating environmental experiences? To address this question, we analyzed longitudinally assessed symptoms of anxiety and depression in eight samples of monozygotic twins of widely varying ages. These samples were drawn from American and European population-based registries. Using hierarchical linear modeling, we examined individual differences and individual changes in the level of symptoms over time. This method enabled us to decompose the variance into the predictable variance shared by both members of each pair of twins, the differences between individuals within pairs, and the residual variance. We then modeled how these components of individual variation changed over time. Within pairs, the twins' predicted levels of symptoms increasingly diverged from childhood until late adulthood, at which point the divergence ceased. By middle adulthood, environmental experiences contributed substantially to stable and predictable interindividual differences in levels of anxiety and depression.     

Stability and change in genetic and environmental components of personality in old age

Stability and change in the mean levels and sources of variation in personality was examined. A sample of 149 monozygotic and 202 dizygotic twin pairs over 80 years were studied three times with a 2-year interval between measurement occasions. The Eysenck Personality Inventory to measure extraversion and neuroticism was used. Linear mixed models and Cholesky variance decomposition were carried out (age, gender and mortality controlled). High mean level stability was found in extraversion and neuroticism. Mortality was related to lower scores in extraversion and higher scores in neuroticism. In extraversion and neuroticism, genetic effects were moderate. Though no new genetic contributions emerged over time, significant new environmental effects were found over time. Controlling for mortality slightly increased genetic effect in extraversion.     

Evolved sex differences in the number of partners desired? The long and the short of it

Do men seek more short-term mates than women? Buss and Schmitt (1993) showed a pattern of mean difference in the ideal number of sexual partners men and women desired over various time frames. We replicated these mean sex differences (e.g., ideal number over the next 30 years: Ms = 7.69 and 2.78 for men and women, respectively), but in both data sets the sampling distributions were highly skewed. In Study 1, we found few sex differences in medians across time frames (e.g., ideal number over the next 30 years: Mdn = 1 for both men and women). In Study 2, most college men (98.9%) and women (99.2%) said they wanted to settle down with one mutually exclusive sexual partner at some point in their life, ideally within the next 5 years. Neither medians in number of partners desired overall before settling down (replicating Study 1) nor medians in short-term partners desired before settling down (Mdn = 0) differed significantly by gender. Rather, men and women concurred: Short-term mating is not what humans typically seek.     

Family obligation and the transition to young adulthood

Changes in a sense of obligation to assist, support, and respect the family were examined among an ethnically diverse group of 745 American individuals as they began to move from secondary school into young adulthood. A sense of family obligation increased for all young adults, with slight variations according to ethnic and financial backgrounds. Young adults from Filipino and Latin American families reported the strongest sense of familial duty during young adulthood, which partially explained their tendency to live with and contribute financially to their families. The implications of family obligation for employment and educational persistence depended on age and academic performance in high school. Finally, a sense of family obligation was associated with more positive emotional well-being.