Personality Test Center

An insightful journey into personality

IPIP-NEO

The IPIP-NEO (International Personality Item Pool Representation of the NEO PI-R™)

The International Personality Item Pool Representation of the NEO PI-R™ (IPIP-NEO), serving as an insightful alternative to the NEO Personality Inventory-Revised (NEO PI-R™), is intricately designed to probe the complexities of human personality. By focusing on key behavioral traits, this tool offers a deep dive into the individual psyche.

Embedded within the structure of the IPIP-NEO are five major personality domains:

  • Neuroticism: Evaluating emotional instability, anxiety, and moodiness.
  • Extraversion: Encompassing traits of sociability, assertiveness, and a propensity for positive emotions.
  • Openness to Experience: Reflecting an individual's engagement with creativity, curiosity, and novel experiences.
  • Agreeableness: Concerning itself with altruism, trust, and cooperative behavior.
  • Conscientiousness: Capturing aspects of self-discipline, organization, and reliability.

Given its comprehensive scope, the IPIP-NEO is invaluable in various contexts, ranging from psychological research to personal growth, enabling a deeper understanding of individual behavioral differences and facilitating insights into how these traits manifest in diverse environments.

The original IPIP-NEO

The original IPIP-NEO inventory, comprised of 300 items, offers an extensive assessment of personality traits. Most individuals complete it within 40-60 minutes, a testament to its depth and comprehensiveness. With over 200,000 completions since its online debut, this version is acclaimed for its robustness and precision. It is generally considered to provide more reliable and valid results than the shorter version. The scoring program for the original IPIP-NEO is highly efficient, with a success rate of over 99% for proper execution and feedback, though occasional technical glitches may occur.

Purpose of this inventory

  • Educational objective: To educate the public about the five-factor model of personality, demonstrating how individuals align with key personality domains.
  • Insight into personality domains: It explains one's standings in broad personality domains, recognizable to those who know the individual well.
  • Assessment of domains and subdomains: This tool estimates standings across 5 broad domains and 30 subdomains, providing a detailed personality profile.
  • Objective nature of the report: The report is objective, focusing on factual personality traits rather than flattering or pleasing insights.
  • Accuracy and validation: Accuracy can be impacted by measurement error and the quality of responses, underscoring the need for careful and sincere participation.
  • External validation: If acquaintances’ perceptions significantly differ from test results, it suggests possible inaccuracies, highlighting the importance of external feedback.

Test acknowledgment and consent

Acknowledgment that you understand the limitations of the test results: Before you can access the test, you must endorse the statement below by clicking the checkbox.

For further information

  • The full IPIP contains 1,699 items assembled by Dr. Lewis R. Goldberg. The URL for Dr. Goldberg's IPIP is http://ipip.ori.org/. The IPIP is in the public domain and its items can be freely downloaded from that site.
  • The IPIP-NEO is not equivalent to the commercial inventory on which it is based, the NEO PI-R™, authored by Paul T. Costa, Jr. and Robert R. McCrae.
  • The scoring and narrative report routines for these items were created by Dr. John A. Johnson, Professor of Psychology, Penn State University.

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