How to Write a Critical Literature Review for University Assignments

Writing a literature review can feel deceptively simple. You find some journal articles, read them, summarise the main points and add references. The problem is that a critical literature review asks for considerably more than that.

Your lecturer wants to see how well you can make sense of a body of research. That means comparing studies, questioning their evidence, noticing disagreements and deciding what the literature actually tells us.

The good news is that critical reviewing is a skill you can learn. Once you understand what to look for when reading and how to organise your notes, the writing becomes much less intimidating.

What Is a Critical Literature Review?

A literature review examines existing academic work on a particular subject or question. A critical review adds evaluation: instead of simply reporting what researchers have written, you consider how convincing their arguments and findings are.

The distinction is important.

Imagine that you are reviewing research on the impact of social media on university students' academic performance.

A descriptive approach might say:

Smith (2023) found that frequent social media use was associated with lower academic performance. Jones (2024), however, found no significant relationship.

That tells your reader what two researchers found, but it stops there.

A critical approach asks why the studies produced different results. Perhaps they used different measures of social media use. Perhaps one study relied on self-reported behaviour while another analysed actual usage data. The samples might also have differed.

That comparison is where your analysis begins.

University guidance consistently makes this distinction. The University of Manchester describes a literature review as a process of grouping, comparing and analysing research rather than producing a sequence of summaries. (University of Manchester Library)

Start With the Assignment Question

Before opening Google Scholar or your university database, spend some time with the question itself.

Look at the command word. "Describe", "analyse", "evaluate", "compare" and "critically discuss" require different approaches.

Then break the question into its main ideas.

For example:

"Critically evaluate the effectiveness of online learning in improving undergraduate student achievement."

You could identify:

• online learning
• undergraduate students
• academic achievement
• effectiveness
• educational outcomes

These terms give you a starting point for your search.

I find it useful to turn the assignment question into a smaller working question:

What does the research currently suggest, how reliable is that evidence, and where do researchers disagree?