PURPOSE Wisdom has received increasing attention in empirical research in recent years, especially in gerontology and psychology, but consistent definitions of wisdom remain elusive. We sought to better characterize this concept via an expert consensus panel using a 2-phase Delphi method. DESIGN AND METHODS A survey questionnaire comprised 53 Likert scale statements related to the concepts of...

In learning theory, the training and test sets are assumed to be drawn from the same probability distribution. This assumption is also followed in practical situations, where matching the training and test distributions is considered desirable. Contrary to conventional wisdom, we show that mismatched training and test distributions in supervised learning can in fact outperform matched distribut...

Both common wisdom and findings from multiple areas of research suggest that it is helpful to understand and make meaning out of negative experiences. However, people’s attempts to do so often backfire, leading them to ruminate and feel worse. Here we attempt to shed light on these seemingly contradictory sets of findings by examining the role that self-distancing plays in facilitating adaptive...

The objective of this paper is to quantify the complexity of rank and nuclear norm constrained methods for low rank matrix estimation problems. Specifically, we derive analytic forms of the degrees of freedom for these types of estimators in several common settings. These results provide efficient ways of comparing different estimators and eliciting tuning parameters. Moreover, our analyses rev...