Psychoanalysis is often perceived as unscientific, and its theories as unsuitable for experimental verification, despite existing results suggesting otherwise. Existing attempts to test psychoanalytic theories do not involve testing the theory of French psychoanalyst Jacques Lacan. This study is an attempt at empirical testing of Lacan's theoretical system of collective identification, hitherto applied in descriptive studies of nationalism. Within his system, the importance of strong affective investments is emphasized as a component of socially constructed notions that are the basis for the longevity of specific national identifications described as Ideal-Ego (the idealistic notion of the nation), Ego-Ideal (the normative notion of the nation), Other (the notion of a threat to the nation), and Super-Ego (the transgressive image of the nation). Lacan’s system of collective identification with a nation has been experimentally tested by stimulating national identification through different linguistic and visual stimuli and measuring the level of four types of identification, expressed through the measurable frequency of use of signifiers and phrases referring to them. For this purpose, an experimental design with two groups was used: the experimental group in which national identification was encouraged and the control code in which national identification was not encouraged. The results showed that there was a significantly higher frequency of signifiers associated with two instances of Lacan’s system of collective identification, the Ego-Ideal, and the Other, in the experimental group compared to the control. Frequencies of signifiers associated with the Ideal-Ego did not prove statistically significantly higher in the experimental group, but this is probably due to accidental stimulation of a specific aspect of national identity in the control group as well. Empirical confirmation of the Super-Ego was provided in the form of a high positive correlation between the tendency to transgress norms in the name of protecting the nation and the expression of national identity. In summary, the results of this research provide an empirical basis for further testing of the elements of national identification and other Lacanian concepts