In this study, I investigated directionality of the relationship between cognition and personality. To investigate this, 173 Red Junglefowl chicks (Gallus gallus) were exposed to a battery of learning tasks, and were as adults (5 months old) assayed in classic personality tests. These were a novel arena and a novel object test, measuring variation in activity, exploration, fear and neophobia among individuals. An early cognitive stimulation had an effect on adult behaviour, increasing the frequency of vigilant behaviours. Additionally, the number of escape attempts performed were reduced. However, active/exploratory behaviours remained unaffected. Therefore, this study partially supports the possibility of cognition affecting personality traits. However, further studies are needed to investigate the mechanisms behind cognitive stimulation and its effect on adult behaviours.