ENThe paper sets to examine the secondary phonological stress, a particularly sensitive prosodic issue. The investigation is based on the data from Svirkos dialect in Vilnius region (district of Švenčionys). The secondary stress helps discriminate between two otherwise identical words, e.g. 'baltas (fem., pl., acc.) and baltas (masc, sg., nom.). The stress was analysed objectively (analysis of acoustic factures in accentuated vowels) and subjectively (auditory experiment with its results assessed by a special programme UKR.PAS). The experiments helped identify that people speaking the dialect of Svirkos are capable of identifying the phonological stress better than syllable accents in monophthongs (75% and 67% correct answers, respectively). The research has established that the dialect, due to a reduced word ending, transfers part of the secondary stress onto the vowels of the stem. The main indicator of the secondary stress is the main tone, whereas the length and quality of the inflexion vowels are slightly less relevant; intensity is the least important. The auditors of the experiment were characterized by their dialect, age, education and car for music (auditory abilities). For the experiment the most crucial was the first factor, i.e. in identifying the secondary stress dialect speakers were the best. [From the publication]