How to write a strong research introduction

A strong introduction usually follows this structure:

Section	Purpose
Broad Context	Introduce the general research area and set the stage.
Real-World Problem	Explain the specific issue affecting the target population.
Significance	Show why the problem matters scientifically, clinically, or socially.
Research Area Expansion	Introduce the key concepts, variables, or mechanisms.
Narrowing Focus	Move from the broad topic to the specific unresolved question.
Key Variables	Clearly define the main variables or outcomes of interest.
Literature Gap	Explain what previous studies have not adequately addressed.
Study Purpose	State what the current study aims to investigate.
Contribution	End by showing how the study will add value to the field.

For discussion writing, see our research discussion guide.