Final answer:
The title suggests that descriptive research was conducted to investigate the State of New York's Grade 4 English Language Arts Assessment.
Step-by-step explanation:
The title, 'Study group in professional development school investigates the State of New York's Grade 4 English Language Arts Assessment,' suggests that descriptive research was conducted. Descriptive research involves observing and describing the characteristics of a certain population or phenomenon without manipulating any variables. In this case, the study group investigated the State of New York's Grade 4 English Language Arts Assessment, providing a description of its current state.