Should I stay or should I go? Approach/avoidance conflict and emotional functioning.

Personality has long held a prevalent place in the pantheon of psychological research. In the last 40 years, neuropsychological models of personality have become a popular predictor of human behaviour and emotionality. With a particular focus on Gray's Reinforcement Sensitivity Theory, this study investigated the interaction of high Behavioural Activation System (BAS) and Behavioural Inhibition System (BIS) as a predictor of emotional functioning. Participants (n = 499) recruited from the community completed an online survey composed of questions on demographic information, behavioural inhibition and activation, emotional instability and indices of depression, anxiety and mixed depression-anxiety. Consistent with our primary hypothesis, the interaction of high BAS × BIS predicted emotional instability using an observed variable path model. This was subsequently associated with depression, anxiety and mixed depression-anxiety symptoms. Future avenues for research using BIS/BAS monitoring in clinical practice and study limitations are discussed. © 2018 John Wiley & Sons, Ltd.