Abstract
Word‐of‐mouth can be a powerful tool for and against marketing a brand. The effect of personality can have a significant effect on an individual's word‐of‐mouth behaviour. One of the most popular personality constructs is the locus of control. This research studied the influence of the locus of control on consumer word‐of‐mouth communications. The results showed that individuals who scored high on their internal locus of control were more likely to engage in word‐of‐mouth communication with their out‐groups. In addition, individuals who scored high on their external locus of control were more likely to engage in word‐of‐mouth communication with their in‐group. Out‐groups are defined as people with a weaker ties relationship, while in‐groups are defined as people with a stronger ties relationship (i.e. close friends and family). These findings would help marketers in directing their promotional programmes more effectively.