DOI:  10.53136/979122181882627 
                                                        
                                                            Pages: 515-529
                                                        
                              
                                                                                                
                                
                                                            
                             Publication date: July 2025
                            
                                                        Publisher: Aracne
                                                        
                                                                    
                                    
SSD: 
                                         L-FIL-LET/12  L-LIN/01  L-LIN/02                                     
                                                        
                        
                        
                        
                     
                    
                 
               
                
                
                
                
                
                    The contribution investigates diaphasic and diatopic variation in the production of extreme tonic vowels by eight female speakers from four distinct Italian regions (Campania, Lazio, Puglia, Sardegna). The analysis focuses on deviations in vowel space and the potential for unsystematic reduction across two communicative contexts. Data collection involved two phases: the first consisted of sentence reading; for the second phase, a spot the difference task was chosen. The analyses show that the variables considered have a significant effect especially for /a/, and for the Campanian /u/.