Facebook Intensity Scale (FBI): A Full Guide for Researchers and Clinicians

By ResRef

Published 2026-11-10

Learn about the Facebook Intensity Scale (FBI): what it measures, how it is scored and interpreted, and how researchers and clinicians use it.

Introduction to the Facebook Intensity Scale (FBI)

The Facebook Intensity Scale (FBI), also frequently referred to as the FIS, remains a cornerstone instrument for scholars examining the nuances of social media engagement. Developed by Nicole B. Ellison, Charles Steinfield, and Cliff Lampe in 2007, this scale provides a more profound metric than traditional frequency or duration measurements. Specifically, the scale was designed to capture the emotional connectedness users feel toward the platform and the extent to which Facebook integrates into their daily routines. Since its inception, the instrument has garnered massive academic attention, boasting over 17,800 citations on Google Scholar. This widespread adoption underscores its utility in social psychology and behavioral sciences. Consequently, understanding its structure and scoring methodology is essential for modern researchers.

This article offers an expert overview of the FBI, detailing its psychometric properties and practical applications in clinical and academic settings.

Key Features of the Facebook Intensity Scale

Purpose and Structure

Facebook Intensity scale is used to measure Facebook usage beyond simple measures of frequency and duration, incorporating emotional connectedness to the site and its integration into individuals’ daily activities. By focusing on these psychosocial factors, the scale provides a more nuanced understanding of how users bond with digital platforms.

The questionnaire consists of eight distinct items that categorize usage into three primary sub-domains:

Behavioral Usage Indicators (2 Items): These items measure the total number of Facebook friends and the average daily time spent on the platform.

Psychosocial & Identity Connection (4 Items): These questions evaluate the internal psychological bond and social identification with the platform. For instance, it measures the user's sense of belonging and the potential emotional impact if the platform were unavailable.

Habitual Daily Integration (2 Items): This section assesses the "automaticity" of usage, determining how deeply Facebook is woven into the user’s everyday routine.

Target Population

While the scale has seen use across various demographics, it was formally validated for a specific group:

Young Adults (18-24 years): This is the primary validated demographic.

Students: Specifically, college and university students were the focus of the original validation studies.

Other Populations: Although researchers have applied the scale to older adults and adolescents, these uses often lack official psychometric validation for those specific age groups.

Scoring Method

The Facebook Intensity Scale consists of eight items: six attitudinal items rated on a 5-point Likert scale (1 = strongly disagree to 5 = strongly agree), and two behavioral items assessing (1) the number of Facebook friends and (2) the average daily time spent on Facebook.

These two behavioral items can be asked as either open-ended or closed-ended (categorical) questions. If researchers ask them as open-ended, they must log-transform the items before averaging due to differing scale ranges. Conversely, if investigators ask them as closed-ended, they use ordinal scales (e.g., 1–10 point scale). Researchers compute the final score by calculating the mean of all items after standardization or log transformation. Higher scores indicate greater intensity. Because the scale is a continuous, sample-relative measure, the authors defined no specific cut-off scores.

Administration Formats

Administering the FBI is highly efficient and flexible, catering to various research and clinical needs. The questionnaire typically requires less than 5 minutes to complete, making it feasible for fast-paced environments. Healthcare teams and researchers can administer the scale through the following formats:

Paper-based forms

Digital (Online) platforms

In-person interviews

Phone or video calls

Importantly, no specialized training is required to use the instrument, as it is designed to be self-administered. This ease of use facilitates its implementation in large-scale surveys or remote study protocols.

Applications of the Facebook Intensity Scale (FBI)

The FBI serves multiple roles in behavioral research:

Screening: Identifies individuals with significant emotional integration or psychological attachment to social media platforms.

For instance, its focus on daily integration makes it ideal for assessing digital habits in young adults.

Languages and Availability of the FBI

The original scale was developed in English, and a formally validated Portuguese version exists. While it has been translated into Arabic, German, and Chinese for various studies, many of these translations lack independent psychometric validation for the literal 8-item version.

Regarding accessibility, the FBI is free to use for research purposes, provided that users give correct citations to the authors. It also follows an open access model, requiring no special licensing for academic use.

Reliability and Validity

The FBI is recognized as a highly reliable and valid instrument for assessing social media intensity among young adults. Its psychometric strength is demonstrated by a Cronbach’s alpha of 0.83, which indicates solid internal consistency. Additionally, the scale has shown stability in measuring usage patterns beyond simple frequency metrics, making it a robust choice for researchers.

Multiple validation studies and scholarly evaluations confirm its effectiveness across different contexts:

The Original Validation Study.

The Portuguese Validation Study.

Limitations and Considerations

Despite its widespread use, the FBI has several limitations that researchers must consider:

Narrow Focus: The scale is specific to Facebook and may not translate perfectly to other social media platforms.

Social Desirability Bias: Users may underreport their usage or overreport their social capital to appear more "connected" or less "addicted".

Other Versions

Several adaptations of the FBI have emerged to address its limitations or platform-specific focus:

Social Media Intensity Scale (SMIS): A general version designed for use across any social media platform.

Social Networking Activity Intensity Scale (SNAIS): An adaptation specifically designed for adolescent populations.

Additional Resources

To further your research or obtain the instrument, please consult the following resources:

Original Validation Study.

Questionnaire Access: You can access the questionnaire as a PDF and view scoring guidelines through this link.

Inquiries: For inquiries, contact Ernst Eypasch, the first author of the questionnaire. (Note: Per instructions, though the contact is Ellison NB at enicole@umich.edu).

Additional Resources: For additional GIQLI resources or permissions, consult Oxford University Press.

Further Validation Data: View the ScienceDirect study for more context on social network usage.

Frequently Asked Questions (FAQ)

Who can use the FBI?

Researchers, psychologists, and sociologists use the FBI for individuals aged 18 to 24, particularly college students. While it is applied to older groups, it is most formally validated for young adults.

How long does it take to complete the FBI?

Participants typically take less than 5 minutes to complete the 8-item scale. Consequently, its brevity makes it ideal for large-scale surveys where respondent fatigue is a concern.

How is the FBI administered?

Healthcare teams and researchers can administer the questionnaire via paper-based forms, digital/online surveys, in-person interviews, or phone calls—offering high flexibility.

Is there any cost to using the FBI?

The FBI is free for use, provided that the authors receive appropriate credit. It is an open-access tool intended for the broader scientific community.

A word from ResRef

The Facebook Intensity Scale is a short, psychometrically sound measure to capture emotional attachment and routine integration of Facebook use. For nuanced analysis, consider MFIS or platform-general expansions and clearly report whether behavioral items are combined or treated separately.

References

Cliff Lampe, Nicole B. Ellison, and Charles Steinfield. 2008. Changes in use and perception of facebook. In Proceedings of the 2008 ACM conference on Computer supported cooperative work (CSCW '08). Association for Computing Machinery, New York, NY, USA, 721–730.

Araújo, E. T. H., Almeida, C. A. P. L., Santos, R. F. dos, Moura, L. K. B., Ramos, C. V., & Feitosa, L. G. G. C. (2020). Adaptação cultural do instrumento Facebook Intensity Scale (FIS) para avaliar o impacto da rede social à saúde: Cultural Adaptation Of The Facebook Intensity Scale (FIS) Instrument To Evaluate The Impact Of The Social Network. Revista Enfermagem Atual In Derme, 91(29).

Sigerson, Leif & Cheng, Cecilia. (2018). Scales for Measuring User Engagement with Social Network Sites: A Systematic Review of Psychometric Properties. Computers in Human Behavior. 83. 10.1016/j.chb.2018.01.023.