Smile judgment in substance use disorders and its relationship to interpersonal and emotional functioning: An...

The current study explored the judgments individuals with Substance Use Disorders (SUDs) make regarding the authenticity of enjoyment smiles and masking smiles containing traces of negative emotions. Accuracy at identifying the masked negative emotions were also examined. Eye-movements were recorded to observe relationships between attentional processes and smile judgment. Additionally, the relationships between smile judgment, emotion dysregulation, and interpersonal problems were investigated. Twenty individuals with SUDs and twenty individuals matched on gender/age participated in the smile judgment task. Results indicated that individuals with SUDs were no different in their categorization of smiles. However, the results showed that individuals with SUDs were significantly more likely to report the presence of negative emotions in the expressions. They were also more often incorrect in their identification of the masked emotions. No link was observed between smile judgment and attentional processes. Emotional and interpersonal functioning were related more to the ability to distinguish smile authenticity than the ability to identify masked emotions.