After the grouping described above, a graph of the correlation between the correct answers for each main class was obtained (Fig. 5). As one can see, for all the classes associated with pathological signals, the pulmonologist group is the most effective one. However, statistically significant differences based on the Kruskal-Wallis test and a comparison of the groups of participants in pairs were obtained only for the class of rhonchi between the group of pulmonologists who scored higher than pediatricians (p = 0.085), other physicians (p = 0.046), interns (p = 0.085) and medical students (p = 0.015). For wheezes, pulmonologists had statistically significantly higher scores than other specializations (p = 0.008). Also interns had better scores than physicians of other specializations (p = 0.026). Generally, it can be stated that this grouping highlighted the advantage of pulmonologists over the rest of the groups in the correct recognition of the respiratory sounds phenomena.