ABSTRACTThe present thesis addresses the question, whether pupils of different age differ with regard to their predominant mode of pitch perception. The starting point for this investigation were previous findings which showed that in adult subjects the way harmonic complex tones are perceived may be trained to some extent and, in addition, is related to the extent of previous musical education. The focus of the present thesis, submitted for diploma, was on the question, whether younger children perceive harmonic complex tones differently as compared to older, more mature children (orientation on fundamental versus spectral pitches). 37 pupils, who were in the 4th year of elementary school and 40 pupils, who were in the 6th and 7th year of secondary school, were tested. A pitch perception test (AAT Seither-Preisler et al., 2007) was used to determine the individual tendency of fundamental versus spectral pitch perception. No age effects could be established. Also, pitch perception was independent of gender. In addition, it was examined whether the predominant mode of pitch perception may be predicted on the basis of musical audiation, musical practise, and passive music consumption. But as these parameters did not explain enough variance, this presumption could not be confirmed. Therefore, the role of genetic endowments (musical talents), of environmental factors (musical practice and auditory exposition), and of the extent to what individuals in different developmental stages differ with regard to pitch perception, still remains to be further investigated.