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Purpose: This page explains what a theoretical / conceptual literature review is, when it is the right choice for an ELT/applied linguistics thesis, and how to write one that supports construct clarity, section alignment, and a defensible research design.

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1. Definition (what it is)

A theoretical / conceptual literature review is a review that primarily synthesizes:

• concepts and constructs (what key terms mean),
• theoretical frameworks (how researchers explain the phenomenon), and
• relationships among constructs (what should predict, shape, or mediate what).

Its main product is not a list of study results. Its main product is a clear conceptual model that explains how the topic works and why the study’s research questions make sense.

2. What it looks like in an ELT thesis

In an ELT/applied linguistics thesis, a theoretical/conceptual review often acts as the chapter’s “spine” because it:

1. establishes your key terms,
2. states the theoretical lens you are using,
3. clarifies what “counts as evidence” for your topic, and
4. keeps the literature review coherent when research findings are diverse.

Many Thesis Seminar projects need this because constructs such as motivation, teacher cognition, formative assessment, feedback, engagement, SEL, anxiety, or gamification can be defined in multiple competing ways.

3. When a theoretical / conceptual review is the best option

A theoretical/conceptual review is especially appropriate when:

• the topic is construct-heavy and terms are used inconsistently across studies.
• the field has many small studies with mixed findings, so you need a unifying explanation.
• the project depends on choosing one framework among several plausible options.
• you want to justify an instrument (survey, rubric, coding scheme) by grounding it in theory.