a unique aspect of human development, where biological, social and psychological factors intersect in a complex way, forming the trajectory of their development. From the very beginning, twins are in a shared fetal environment, which can impose special conditions, such as the sharing of nutrient and oxygen resources in the womb. This can lead to individual differences in neurodevelopment, depending on the allocation of these resources or the occurrence of complications related to pregnancy and childbirth. These early biological differences can later be reflected in the level of neuropsychological functioning of each twin, for example, in differences in motor or cognitive abilities. Psychologically, twin development is characterized by strong interdependence, which may contribute to slowing down some aspects of individual psychological independence, as each twin relies on the other for interaction and emotional support. This interdependence can sometimes lead to a relative delay in the development of individual identity or independent social abilities, especially if twins are viewed as a unit rather than as two separate individuals. In terms of communication, twins can develop unique and unconventional patterns of interaction, sometimes referred to as “twin language” – a unique form of verbal or non-verbal communication that promotes mutual understanding but can hinder their participation in broader social communication patterns. Accordingly, it can be argued that the development of twins is characterized by special neuropsychological features due to the interaction of genetic, environmental, and social factors. This makes the study of this group of people especially important for understanding the dynamics of multidimensional human development and developing educational and psychological strategies that take into account their individual and collective needs.