refers to the attitude and skills involved in understanding mental states, both one's own as well as those of others, and their connections with feelings and behaviour. The terms 'mentalization' and 'mentalizing' are often used interchangeably; the latter is derived from a verb and therefore perhaps more accurately captures that this is a continuous activity rather than a fixed state of mind or the specific characteristic of a n individual. Mentalizing mostly occurs without effort or specific consciousness; it is a process of perceiving and interpreting human behaviour in terms of intentional mental states such as feelings, needs, reasons, or purposes. Mentalizing enables us to create a picture of the thoughts, feelings, and intentions of those around us and to help us make sense of their actions in the same terms that we organize our own subjective experiences. It is important for representing, communicating, and regulating feelings and belief states linked to one's wishes and desires.Mentalizing is a fundamentally bidirectional or transactional social process which develops in the context of interactions with others, and in the first instance in the context of early attachment relationships. Its quality in relation to understanding others is influenced by how well those around us mentalize. The experience of how other people mentalize is internalized, enabling us to enhance our own capacity for empathizing and better engaging in interactive social processes (Fonagy, Gergely, Jurist, & Target, 2002). In situations of stress, difficulties in mentalizing almost inevitably arise. If mentalizing cannot be restored, a rapidly emerging vicious cycle can emerge, with intense emotions erupting, leading to a temporary loss of the capacity to think about the thoughts and feelings of others and the self in a balanced way (Bateman & Fonagy, 2016). For example, when stressed, a parent's mind might become temporarily closed to seeing his child from a perspective other than his own. So when she is calling out for her father to play with her, whilst he is working on his computer, he might see this as her just 'being difficult', and call out to her to "be quiet and wait" and to entertain herself. If the child feels that she is not being