A comparison of two life stress assessment approaches: prospective prediction of treatment outcome in recurrent depression

Research on life stress has been characterized by inconsistent results, which some researchers attribute to different assessment methodologies. Generally, studies have used either self-report checklists or investigator-based interviews. To test whether different results are derived from these approaches, the authors compared information from a self-report measure of life stress with the additional data available from a follow-up investigator-based measure in prospectively predicting the outcome of treatment for recurrent major depression. The 2 approaches produced different results, with investigator-based life events predicting lower probability of remission and self-report life events either predicting increased likelihood of remission or not predicting at all. The results demonstrated that methodology may account for some of the inconsistencies in the life stress literature.     

Contributions to Estimation of Polychoric Correlations

This research concerns the estimation of polychoric correlations in the context of fitting structural equation models to observed ordinal variables by multistage estimation. The first main contribution of this research is to propose and evaluate a Monte Carlo estimator for the asymptotic covariance matrix (ACM) of the polychoric correlation estimates. In multistage estimation, the ACM plays a prominent role, as overall test statistics, derived fit indices, and parameter standard errors all depend on this quantity. The ACM, however, must itself be estimated. Established approaches to estimating the ACM use a sample-based version, which can yield poor estimates with small samples. A simulation study demonstrates that the proposed Monte Carlo estimator can be more efficient than its sample-based counterpart. This leads to better calibration for established test statistics, in particular with small samples. The second main contribution of this research is a further exploration of the consequences of violating the normality assumption for the underlying response variables. We show the consequences depend on the type of nonnormality, and the number and location of thresholds. The simulation study also demonstrates that overall test statistics have little power to detect the studied forms of nonnormality, regardless of the ACM estimator.     

The Ethical Perspective: An Identity Theory of the Psychological Influences on Moral Choice

The 2008 Presidential Address presents the theory of ethical perspective, an identity theory of moral psychology designed to detect the psychological influences on moral choice. Part 1 treats findings on altruism and genocide as an analytical lens through which we can gain insight into political and moral behavior. Part 2 describes moral psychology as a field, presenting a new and broader conceptualization for the discipline. Part 3 outlines an identity theory of moral choice that focuses on the critical role of the ethical perspective, to suggest how an empirically based theory of moral choice looks in practice. Part 4 concentrates on the basic assumptions underlying the theory of ethical perspective. It presents empirical evidence that supports this theoretical framework, from fields as diverse as neuroscience and primatology to child development and linguistics, thus demonstrating political psychology's important links to other disciplines. In addition to presenting a new theory of moral psychology, designed to fill an important gap in the literature on ethics and moral choice, the Address treats studies of altruism and genocide as an illustration of research that reveals broader insight into the nature of political psychology as a discipline.     

Comma N' cents in pricing: The effects of auditory representation encoding on price magnitude perceptions

Numbers and prices can be processed and encoded in three different forms: 1) visual [based on their written form in Arabic numerals (e.g., 72)], 2) verbal [based on spoken word-sounds (e.g., “seventy” and “two”), and 3) analog (based on judgments of relative “size” or amount (e.g., more than 70 but less than 80)]. In this paper, we demonstrate that including commas (e.g., $1599 vs. $1599) and cents (e.g., $1599.85 vs. $1599) in a price's Arabic written form (i.e., how it is perceived visually) can change how the price is encoded and represented verbally in a consumer's memory. In turn, the verbal encoding of a written price can influence assessments of the numerical magnitude of the price. These effects occur because consumers non-consciously perceive that there is a positive relationship between syllabic length and numerical magnitude. Three experiments are presented demonstrating this important effect.     

Recurrence in major depression: a conceptual analysis

Theory and research on major depression have increasingly assumed a recurrent and chronic disease model. Yet not all people who become depressed suffer recurrences, suggesting that depression is also an acute, time-limited condition. However, few if any risk indicators are available to forecast which of the initially depressed will or will not recur. This prognostic impasse may be a result of problems in conceptualizing the nature of recurrence in depression. In the current paper we first provide a conceptual analysis of the assumptions and theoretical systems that presently structure thinking on recurrence. This analysis reveals key concerns that have distorted views about the long-term course of depression. Second, as a consequence of these theoretical problems we suggest that investigative attention has been biased toward recurrent forms of depression and away from acute, time-limited conditions. Third, an analysis of how these theoretical problems have influenced research practices reveals that an essential comparison group has been omitted from research on recurrence: people with a single lifetime episode of depression. We suggest that this startling omission may explain why so few predictors of recurrence have as yet been found. Finally, we examine the reasons for this oversight, document the validity of depression as an acute, time-limited disorder, and provide suggestions for future research with the goal of discovering early risk indicators for recurrent depression.     

Life events and depression in adolescence: relationship loss as a prospective risk factor for first onset of major depressive disorder

Although stressful life events have consistently been linked to the onset of major depressive disorder (MDD), most research has not distinguished 1st episodes from recurrences. In a large epidemiologic sample of older adolescents (N = 1,470) assessed at 2 time points, the risk conferred by a recent romantic break-up was examined as a predictor of 1st onset versus recurrence of MDD. Results indicated a heightened likelihood of 1st onset of MDD during adolescence if a recent break-up had been reported; in contrast, a recent break-up did not predict recurrence of depression. These results held for both genders and remained significant after controlling for gender. Additional analyses to determine the discriminant validity and specificity of these findings strongly supported the recent break-up as a significant risk factor for a 1st episode of MDD during adolescence. Implications of these findings and subsequent research directions are discussed.     

Self-schema for assertiveness: Extending the validity of the self-schema construct

This research attempted to extend the validity of the self-schema concept by examining a previously untested self-attribute and by examining self-schema effects on the interpretation of more realistic stimulus situations than used in past studies. The attribute was a self-schema for assertiveness and the validity of this self-knowledge structure was evaluated in two studies. In Stuty 1 assertion schematics and aschematics were compared for retrieval of schema-relevant information on a laboratory task of incidental recall. In Study 2 schematics and aschematics were compared on five different tasks that required elaboration of information about rights assertion conflict situations. Study 1 results revealed that schematics as compared to aschematics recalled more assertion related adjectives but did not differ in recall of domain-irrelevant words. Results from Study 2 showed that schematics as compared to aschematics recalled more past instances of assertive behaviors when asked to elaborate why an assertion adjective was endorsed as “Like me”. Also, schematics were significantly more certain they would behave assertively both in situations where assertion was appropriate and in those where compromise was more appropriate. On two perceptual factors known to correlate with assertive behavior, schematics were more likely to judge moderately legitimate requests (i.e., ambiguous requests) as more unreasonable and when asked to generate expected consequences for assertive responses focused more on self rather than other person consequences. The consistency of the results with respect to various hypothesized functions of the self-schema construct are discussed.