This book contributes to the research of Generative Grammar. It calls for models that provide insights into biological processing capabilities and information processing procedures.

The book focuses on highlighting innovative perspectives in the study of linguistic phenomena concerning GB theory (Principles and Parameters Theory) using the example of German and Polish. The subject of the following considerations is the phenomenon of agreement between the subject and the finite verb with regard to the categories of person, number, and gender.

It explores the processing of agreement categories and their possibilities for merging, their phonological expression, the correlation between phonological and logical form, as well as competing variants of agreement checking within the X-bar schema.