Table of Contents
Extrovert and Introvert Personality Inventory (IPEI)
Here in this post, we are sharing the “Extrovert and Introvert Personality Inventory (IPEI)”. You can read psychometric and Author information. We have thousands of Scales and questionnaires in our collection (See Scales and Questionnaires). You can demand us any scale and questionnaires related to psychology through our community, and we will provide you with a short time. Keep visiting Psychology Roots.
About Extrovert and Introvert Personality Inventory (IPEI)
Scale Name
Extrovert and Introvert Personality Inventory (IPEI)
Author Details
Mohammad Aziz Shah Mohamed Arip, Nurul Hidayu Mohammad, Nur Hafizah Ibrahim, and Nurul Syahirah Husin
Translation Availability
Not Sure

Background/Description
The Extrovert and Introvert Personality Inventory (IPEI) was designed to measure two primary personality dimensions: extroversion and introversion. The inventory was developed to provide a reliable and valid tool for assessing these traits among university students, offering a better understanding of their personality orientations in academic and social settings.
The concept of extroversion typically refers to an outgoing, energetic personality, while introversion is characterized by a more reserved and reflective nature. The IPEI measures where individuals fall on this spectrum, providing insights into their social behavior, energy levels, and communication preferences.
Administration, Scoring and Interpretation
- The inventory is intended for university students but can be used for other populations in educational or social contexts.
- The IPEI is a self-report questionnaire with Likert-scale responses. Participants rate their agreement with statements that reflect extrovert and introvert tendencies.
- The questionnaire consists of items that assess preferences for social interaction, energy levels, and personal reflection. Participants are asked to rate each item based on how well it describes their typical behavior.
- Higher scores on the extroversion items reflect stronger extrovert tendencies, such as enjoying socializing, being outgoing, and thriving in group activities.
- Higher scores on the introversion items indicate stronger introvert tendencies, such as preferring solitude, engaging in deep reflection, and avoiding large social gatherings.
- The results help to identify whether an individual exhibits more extroverted or introverted personality traits. These insights can be used to understand their social preferences, academic behaviors, and overall personality.
Reliability and Validity
The IPEI was developed through rigorous psychometric testing to ensure its reliability and validity. The authors conducted factor analyses to confirm that the items effectively measure extroversion and introversion as separate, but related constructs.
- Reliability: The inventory demonstrated strong internal consistency and test-retest reliability, indicating that the tool consistently measures personality traits over time.
- Validity: The scale’s construct validity was supported by its correlations with other well-established measures of personality. The inventory showed expected patterns of correlation with social behavior and academic performance.
Available Versions
30-Items
Reference
Arip, M. A. S. M., Hidayu, M. N., Ibrahim, N. H., & Husin, N. S. (2017). Validity and reliability development of extrovert and introvert personality inventory among university students. International Journal of Academic Research in Business and Social Sciences, 7(9), 451-463.
Important Link
Scale File:
Frequently Asked Questions
Q: What does the Extrovert and Introvert Personality Inventory (IPEI) measure?
A: The IPEI measures the personality traits of extroversion and introversion, assessing where individuals fall on the spectrum between these two orientations.
Q: Who is the IPEI designed for?
A: The inventory was developed primarily for university students, but it can be used for individuals in other educational and social contexts.
Q: How does the IPEI differ from other personality inventories?
A: The IPEI focuses specifically on the extroversion-introversion dimension, while other inventories, such as the Big Five, assess broader personality traits.
Q: Can the IPEI be used for career counseling?
A: Yes, understanding whether someone is more extroverted or introverted can help guide career decisions, particularly in roles requiring specific social or reflective skills.
Q: How long does it take to complete the IPEI?
A: The inventory is relatively short and can typically be completed in 10-15 minutes.
Disclaimer
Please note that Psychology Roots does not have the right to grant permission for the use of any psychological scales or assessments listed on its website. To use any scale or assessment, you must obtain permission directly from the author or translator of the tool. Psychology Roots provides information about various tools and their administration procedures, but it is your responsibility to obtain proper permissions before using any scale or assessment. If you need further information about an author’s contact details, please submit a query to the Psychology Roots team.
Help Us Improve This Article
Have you discovered an inaccuracy? We put out great effort to give accurate and scientifically trustworthy information to our readers. Please notify us if you discover any typographical or grammatical errors.
Make a comment. We acknowledge and appreciate your efforts.
Share With Us
If you have any scale or any material related to psychology kindly share it with us at psychologyroots@gmail.com. We help others on behalf of you.