U ovom radu ispitivan je utjecaj istraživača na rezultate kinetičke analize neizotermne toplinske razgradnje četiri polimera. Analizirani polimeri imaju različite stupnjeve složenosti razgradnog procesa. Kinetičku analizu provelo je troje istraživača, jedan znanstveni savjetnik, jedan znanstveni suradnik te jedan doktorand, a svi su se koristili istim eksperimentalnim termogravimetrijskim podatcima te istim kinetičkim programom (Netzsch Thermokinetics Professional). Rezultati nedvojbeno pokazuju da istraživači imaju značajan utjecaj na rezultate kinetičke analize, budući da su procese neizotermne toplinske razgradnje svih uzoraka opisali različitim kinetičkim shemama i time različitim kinetičkim parametrima.; In this paper, the influence of researchers on the results of kinetic analysis of non-isothermal thermal decomposition of four polymers was investigated. Four polymers having different degrees of complexity of the degradation process were analysed. The kinetic analysis was performed by three researchers: one scientific advisor with tenure, one research associate and one doctoral student, all of whom used the same experimental thermogravimetric data. Kinetic analysis was performed using the Netzsch Thermokinetics Professional program. The results unequivocally showed that the researchers have a significant influence on the results of kinetic analysis, since they described the processes of the non-isothermal thermal decomposition of all samples by different kinetic schemes, and thus by different kinetic parameters.