An annotated bibliography is a list of sources (like books, articles, and websites) about a specific topic, where each source is followed by a brief descriptive and evaluative paragraph (the annotation).
Below is a complete, properly formatted example using APA style (7th edition) on the topic of the impact of social media on adolescent mental health.
Annotated Bibliography Example
Topic: Social Media and Adolescent Mental Health
References and Annotations
Twenge, J. M., Joiner, T. E., Rogers, M. L., & Martin, G. N. (2018). Increases in depressive symptoms, suicide-related outcomes, and suicide rates among US adolescents after 2010 and links to increased new media screen time. Clinical Psychological Science, 6(1), 3–17. https://doi.org/10.1177/2167702613723384
Summary: This study investigates the rapid increase in depressive symptoms and suicide-related outcomes among U.S. adolescents beginning around 2012. Analyzing data from large national surveys (Monitoring the Future and the Youth Risk Behavior Surveillance System) covering over 500,000 teens, the authors track trends in mental health alongside daily time spent on “new media” (smartphones, social media, and electronic devices).
Assessment: Jean Twenge is a prominent psychologist known for her research on generational trends. This article is foundational for researchers arguing that excessive screen time is a primary driver of youth mental health decline. While the study relies heavily on correlational data rather than direct causation—a limitation acknowledged by the authors—it provides robust statistical evidence across massive sample sizes, making it an essential reference for discussions surrounding digital wellness policies.
Valkenburg, P. M., & Peter, J. (2009). The social consequences of the Internet for adolescents: A decade of research. Current Directions in Psychological Science, 18(1), 1–5. https://doi.org/10.1111/j.1467-8721.2009.01595.x
Summary: This review article synthesizes a decade of empirical research on how internet and online communication use affects adolescents’ social development and psychological well-being. The authors introduce the “stimulation hypothesis” and the “rich-get-richer hypothesis,” arguing that online communication can enhance existing friendships and reduce social anxiety for many teens, though outcomes depend heavily on individual differences and the nature of the online interactions.
Assessment: This peer-reviewed article offers a balanced, nuanced perspective compared to more alarmist literature. It is particularly useful for establishing a theoretical framework that differentiates between passive social media consumption and active social connection. Valkenburg and Peter are leading experts in media psychology, lending high credibility to the synthesis.
Primack, B. A., Shensa, A., Sidani, J. E., Whaite, E. O., Lin, L. Y., Rosen, D., Colditz, J. B., Radovic, A., & Miller, E. (2017). Social media use and perceived social isolation among young adults in the U.S. American Journal of Preventive Medicine, 53(1), 1–8. https://doi.org/10.1016/j.amepre.2017.01.010
Summary: Utilizing a nationally representative survey of over 1,750 young adults aged 19 to 32, this quantitative study explores the correlation between the amount of time spent on social media platforms and perceived social isolation (PSI). The researchers controlled for multiple demographic and socioeconomic confounding variables to isolate the association.
Assessment: The findings reveal a significant, robust association between increased social media usage and higher levels of perceived social isolation—contradictory to the premise that social media inherently connects people. Published in a respected medical journal, the study is methodologically rigorous and provides objective survey metrics that are vital for public health research on loneliness.
Key Components of an Annotated Bibliography
Notice how each entry above follows a standard structure:
- Citation: Formatted according to the required academic style guide (APA, MLA, Chicago, etc.).
- Summary: Briefly outlines the main argument, research methods, and core findings of the source.
- Assessment (Evaluation): Critically evaluates the source’s credibility, author expertise, potential biases, methodology limitations, and usefulness to your broader research project.
