Understanding the role of mind wandering in stress-related working memory impairments

Mind wandering has been identified as a possible cause for stress-related working memory (WM) task impairments following laboratory stressors. The current study attempted to induce mind wandering regarding negative, positive, or neutral events using an expressive writing task and examined the impact on WM task performance. We examined the role of mind wandering in understanding the impact of life stress on WM. Additionally, we explored the role of thought suppression on the relationship between mind wandering and WM. One hundred and fifty participants completed WM measures before (Time 1) and after (Time 2) the writing manipulation. The writing manipulation did not alter mind wandering or WM task performance. Time 1 WM predicted mind wandering during the Time 2 WM task, which subsequently predicted poorer Time 2 WM task performance. The impact of daily life stress on WM was mediated by mind wandering. Trait levels of thought suppression moderated the impact of mind wandering on WM. Specifically, higher levels of suppression resulted in stronger negative impact of mind wandering on WM task performance. Findings are discussed in terms of the impact of mind wandering on WM task performance.     

Unexpected Positive Events Do Not Result in Flashbulb Memories

The study of flashbulb memories has typically been confined to negative events such as the terrorist attacks of 11 September 2001. Previous studies that investigated the role of affect on memory formation have produced conflicting results, making it difficult to ascertain the properties of positive flashbulb memories. In the current study, we employ previously established methods to investigate flashbulb memory formation for the assassination of Osama bin Laden. This resonated as a highly positive event for many Americans evidenced by the thousands of people flooding the streets of Washington, D.C., and New York City to celebrate. Results confirm the fading of memory details over time and further suggest that positive events do not result in the heightened vividness and confidence seen in negatively valenced flashbulb memories. We argue that these findings are additional evidence against a special memory mechanism in flashbulb memory formation. Copyright © 2014 John Wiley & Sons, Ltd.