Although cognitive over-arousal has been hypothesised as a causal factor in sleep-onset insomnia, relatively little is known about the specific pre-sleep intrusions which delay sleep. To investigate this relationship adequately 'live', verifiable, unobtrusive and independent monitoring of thought process and sleep pattern is essential. This study was designed with these requirements in mind. Vo...

A lifespan perspective on personality and health uncovers new causal pathways and provides a deeper, more nuanced approach to interventions. It is unproven that happiness is a direct cause of good health or that negative emotion, worry, and depression are significant direct causes of disease. Instead, depression-related characteristics are likely often reflective of an already-deteriorating tra...

Modern memory researchers rely heavily on the encoding-retrieval match, defined as the similarity between coded retrieval cues and previously encoded engrams, to explain variability in retention. The encoding-retrieval match is assumed to be causally and monotonically related to retention, although other factors (such as cue overload) presumably operate in some circumstances. I argue here that ...

This article proposes distinctions between guilt and two forms of shame: Guilt arises from a violated norm and is characterized by a focus on specific behavior; shame can be characterized by a threatened social image (Image Shame) or a threatened moral essence (Moral Shame). Applying this analysis to group-based emotions, three correlational studies are reported, set in the context of atrocitie...

Numerous theories in social and health psychology assume that intentions cause behaviors. However, most tests of the intention- behavior relation involve correlational studies that preclude causal inferences. In order to determine whether changes in behavioral intention engender behavior change, participants should be assigned randomly to a treatment that significantly increases the strength of...

Various books and popular media outlets claim that mindless smartphone use can impair creativity, yet few studies have tested this idea. We conducted a survey three correlational focused on divergent thinking, the mindful ability to generate creative responses open-ended problems. Most of 48,000 participants surveyed thought reduced creativity. This view was consistent with negative correlation...

Does task significance increase job performance? Correlational designs and confounded manipulations have prevented researchers from assessing the causal impact of task significance on job performance. To address this gap, 3 field experiments examined the performance effects, relational mechanisms, and boundary conditions of task significance. In Experiment 1, fundraising callers who received a ...

Recent research reveals a link between individual differences in mathematics achievement and performance on tasks that activate the approximate number system (ANS): a primitive cognitive system shared by diverse animal species and by humans of all ages. Here we used a brief experimental paradigm to test one causal hypothesis suggested by this relationship: activation of the ANS may enhance chil...