The personality traits of neuroticism, openness, and conscientiousness are relevant factors for cognitive aging outcomes. The present study examined how these traits were associated with cognitive abilities and corresponding resting-state functional connectivity (RSFC) of the default mode network (DMN) in an older and predominantly minority sample. A sample of 58 cognitively unimpaired, largely African-American, older adults (M age = 68.28 ± 8.33) completed a standard RSFC magnetic resonance imaging sequence, a Big Five measure of personality, and delayed memory, Stroop, and verbal fluency tasks. Personality trait associations of within-network connectivity of the posterior cingulate cortex (PCC), a hub of the DMN, were examined using a seed-based approach. Trait scores were regressed on cognitive performance (delayed memory for neuroticism, Stroop for conscientiousness, and verbal fluency for openness). Greater openness predicted greater verbal fluency and greater RSFC between the PCC and eight clusters, including the medial prefrontal cortex, left middle frontal gyrus, and precuneus. Greater PCC–precuneus connectivity predicted greater verbal fluency. Neuroticism and conscientiousness did not significantly predict either cognitive performance or RSFC. Although requiring replication and elaboration, the results implicate openness as a contributing factor to cognitive aging via concomitant cognitive performance and connectivity within cortical hubs of the DMN and add to the sparse literature on these variables in a diverse group of older adults.

Conflict is a ubiquitous feature of groups in organizations that clearly affects group performance. While prior research has investigated the role of personality on conflict resolution styles at the individual level, little work has examined the role of personality on the emergence of conflict. This may be partially due to the fact that the emergence of conflict is inherently a group-level phenomenon, and thus requires the aggregation of personality to the group (or at least dyadic) level of analysis. I propose that each of the Big Five personality traits (or specific facets), at the group level, affect the emergence of either task conflict, relationship conflict, or both. Developing our understanding of how group personality composition affects both of these types of conflict is necessary to better enable groups to manage conflict, and thereby lessen potentially harmful outcomes resulting from conflict.