Poor vs. Strong Literature Review Example: Psychology

Teaching-example notice: The passages below are illustrative. Placeholder authors in the weak examples are fictional, and all citations, effect sizes, sample statistics, design descriptions, and gap claims in the stronger examples must be checked against the original literature and a current search before academic use. Do not cite this page as evidence.

Five Psychology-Specific Dimensions Used in This Comparison

These dimensions show how the general comparison framework can be applied to psychology writing. The appropriate evidence and reporting conventions still depend on the research question, review type, institution, and target journal.

Paragraph 1: Establishing the Phenomenon

Poor Literature Review Example

Mindfulness-based interventions (MBIs) are a popular way to reduce anxiety in young people. Smith (2018) found that MBIs reduce anxiety in a sample of adolescents. Jones (2019) also found positive effects. However, a recent study by Brown (2021) found no effect. Therefore, the results are mixed. More research on mindfulness and anxiety is needed, especially with young people.

Editorial notes

• “Popular way” is vague and unsupported.

• The paragraph uses fictional single-study citations to establish what is supposedly known.

• “Positive effects” and “no effect” provide no magnitude or uncertainty.

• The design, sample, comparison condition, and outcome measurement are not identified.

• “More research is needed” does not define a researchable gap.

Stronger Literature Review Example

Mindfulness-based interventions (MBIs) have gained empirical support for reducing anxiety symptoms across adult populations, with meta-analytic evidence reporting an overall effect (Goldberg et al., 2018; Khoury et al., 2015). However, reported effect estimates for adolescent samples are smaller than those reported for adults, suggesting that the mechanisms associated with MBI outcomes may not transfer uniformly across developmental stages (Carsley et al., 2017; Zoogman et al., 2015). While experimental evidence has examined reductions in ruminative thought as a possible pathway, cross-sectional work has reported that self-reported mindfulness is only weakly associated with anxiety outcomes after accounting for comorbid depression [verified sources required]. Taken together, the evidence does not yet establish a clear, developmentally specific causal account.

Editorial notes

• The opening uses synthesis-level evidence to frame the phenomenon.

• The comparison focuses on effect estimates rather than vague directions.

• Experimental and cross-sectional evidence are distinguished.

• The critique names a potential confound and a causal limitation.

• The gap begins to emerge from the evidence instead of appearing as a separate unsupported claim.

What Changed?

Paragraph 2: Presenting Mixed Evidence

Poor Literature Review Example

Some studies found that MBIs work for teenagers. Other studies found they do not. It depends on the type of mindfulness and the setting. More studies are needed to find out why.

Editorial notes

• “Some studies” and “other studies” provide neither citations nor findings.

• “It depends” is a placeholder because no moderator is defined.

• The paragraph identifies no design, effect estimate, mechanism, or measurement issue.

Stronger Literature Review Example

A growing body of school-based MBI research with adolescents has attempted to address this discrepancy, with studies reporting mixed results: some report reductions in self-reported anxiety, whereas others report no additional effect beyond waitlist control conditions (Biegel et al., 2009; Kuyken et al., 2013; Felver et al., 2016; Dunning et al., 2019). Proposed explanations include small samples, limited use of active control groups, and reliance on self-report measures without physiological corroboration (Dunning et al., 2019; Klingbeil et al., 2017).

Editorial notes

• The evidence is organized by position rather than summarized study by study.

• The transition explains the relationship between supporting and null findings.

• The methodological critique identifies concrete design and measurement issues.

• These limitations create a logical basis for the more precise gap in the next paragraph.

Paragraph 3: Building a Precise Gap

Poor Literature Review Example

There are some limitations in the MBI literature. Many studies use small samples. Some only look at adults. More research should be done on adolescents and on different types of mindfulness programs. Future work is needed to understand how mindfulness works for young people.

Editorial notes

• “Some limitations” is vague.

• The paragraph lists weaknesses without converting them into an answerable research problem.

• “Different types of mindfulness programs” is not operationalized.

• The final sentence repeats a generic call for research.

Stronger Literature Review Example

A current, verified search is needed to determine whether existing meta-analyses have examined how intervention components—such as session frequency, facilitator training, and parent involvement—moderate outcomes specifically for adolescents. If that evidence gap is confirmed, a study could use meta-regression to examine school-based MBIs for adolescents aged 12–18 and test intervention components as moderators of anxiety outcomes.

Editorial notes

• The candidate gap specifies the population, intervention components, and analytical approach.

• The language treats the gap as something to verify, not something an AI or writer may simply declare.

• The proposed study follows from the methodological critique in Paragraph 2.

• The positioning identifies a method, setting, population, and outcome.

Five Common Warning Signs in Psychology Literature Reviews

• Using isolated studies to describe an established evidence base when a relevant systematic review or meta-analysis is available.

• Reporting effects only as “large,” “small,” “positive,” or “negative,” without the relevant estimate, uncertainty, or context.

• Using “more research is needed” as the entire gap statement.

• Treating correlational and experimental evidence as if they support the same conclusions.

• Introducing a gap without first showing how specific limitations or inconsistencies leave an important question unresolved.

These are diagnostic signals, not universal rules. A single primary study may be appropriate for an emerging question, and an effect estimate is meaningful only when interpreted with its measure, confidence interval, design, population, and context.

From Poor to Strong: Psychology Rewrite Checklist

1. Choose an appropriate evidence anchor.

   When summarizing an established phenomenon, check whether a current systematic review or meta-analysis is available.

2. Report magnitude responsibly.

   Include the appropriate effect estimate and uncertainty when the source provides them, then explain what they mean in context.

3. Signal the study design.

   Distinguish randomized, longitudinal, cross-sectional, qualitative, and synthesis-level evidence.

4. Critique before defining the gap.

   Identify concrete sampling, measurement, comparison, bias, or generalizability limitations.

5. Specify the candidate gap.

   Define the population, condition or component, and missing evidence or analysis.

6. Verify the gap.

   Run a current search and check whether another review or study has already addressed it.

7. Read without the author names.

   Make sure your synthesis and reasoning remain visible instead of relying on a list of citations.

Work on the Next Revision with Acade

Tell Acade your psychology research question, population, constructs, verified sources, and the paragraph you are revising. Ask it to compare claims, evidence, and limitations, then identify the next revision without inventing sources or results.

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Frequently Asked Questions

What Does a Poor Psychology Literature Review Look Like?

A weak psychology literature review often summarizes studies one at a time, reports effects without magnitude or context, fails to distinguish research designs, and ends with a generic call for more research. The central problem is not simply missing citations; it is missing synthesis and reasoning across sources.

How Do You Write a Strong Psychology Literature Review Paragraph?

Start with evidence appropriate to the maturity of the question. Compare findings using relevant estimates, populations, measures, and designs. Explain the conditions under which results differ, identify specific methodological limitations, and derive a candidate gap that can be verified through a current search.

Why Are Effect Sizes Important in Psychology Literature Reviews?

Effect sizes help readers assess the magnitude of a relationship or difference rather than only whether a statistical test crossed a significance threshold. They must still be interpreted alongside uncertainty, study design, measurement quality, sample characteristics, and practical or clinical context. No single value is automatically trivial or meaningful in every setting.

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