The past decade has seen a rapid development of Augmented Reality (AR) systems and applications in many research areas including education, medicine and psychological treatments. This has been due to the growing evidence of the potential of AR systems on supporting learning tasks among other benefits. However, very little is known about the potential impact of using AR systems for influencing the emotional state of users in the treatment of cognitive impairment. In this paper, we build upon our previous work on developing a tool based on augmented reality to stimulate the emotions of patients suffering with dementia through audiovisual content (image, video and audio) [1]. Here, we focus on exploring the effects of stimulation of emotions in a controlled experiment where users of the AR system were presented with different types of multimedia. The data was collected in different sessions and analysed using a 2-factor ANOVA test to compare and determine the differences/changes in users’ emotions. Our findings suggest that there is a significant relationship between the emotions that the user feels before and after having contact with audiovisual stimuli, thus, showing the potential for being used as efficient tools for improving the emotional state of cognitive impairment sufferers.