When researchers study personality, this is the model they reach for
The Big Five is the personality framework most widely used in research. It puts you into no category at all. It measures where you sit on five spectrums: Openness, Conscientiousness, Extraversion, Agreeableness and Emotional Stability.
This version uses the 50 standard items from the public-domain IPIP scale (Goldberg, 1992), answered on a five-point agreement scale. You get an exact percentage on all five dimensions, a five-axis radar chart, and a read on who your two most pronounced dimensions add up to. Where a dimension lands in the middle, we tell you plainly that you are borderline.
Big Five: common questions
What is the Big Five (OCEAN) model?
The Big Five, also called the five factor model or OCEAN, describes a person along five dimensions: Openness (appetite for new things and abstract ideas), Conscientiousness (self-discipline and planning), Extraversion (whether energy arrives from people or from solitude), Agreeableness (softness toward others), and Emotional Stability (the baseline of mood under pressure). It is the framework most widely used in personality research, and both Goldberg's (1992) marker set and the IPIP item pool are public-domain resources that researchers anywhere can use freely.
How is the Big Five different from a 16-type test?
A 16-type test sorts you into a category, which is easy to remember and easy to share. The Big Five sorts you into nothing and hands you an exact percentage on five dimensions instead. Personality runs as a spectrum: 52 percent extraverted and 91 percent extraverted both get called an extravert by a type test, and the Big Five tells you honestly how far apart those two are.
Is low Emotional Stability a bad result?
It is a widely held misreading. Low Emotional Stability (high Neuroticism in the original literature) means a finely tuned emotional radar: you register risk earlier, you feel other people's pain more accurately, and you tend to be more sensitive to art and to detail. Many makers and many carers sit here. What it asks for is care rather than repair. This test presents it as a trait plus how to look after it, and makes no medical or clinical assessment of any kind.
Is the full result free?
Yes. All five exact percentages, the radar chart, the per-dimension write-up and the dominant-pair reading are free, with no sign-up. If you want to go deeper there is an optional Deep Analysis at NT$399: an AI-written personal read built from your own five percentages, covering career direction, how you relate to people, and how to look after yourself under pressure. It needs no birth data, only the answers you just gave.
Where do the questions come from?
All 50 items are the IPIP (International Personality Item Pool) Big Five markers from Goldberg (1992), a public-domain, validated item bank and one of the most widely used Big Five instruments in research worldwide. This English version uses the original IPIP wording.
How is the Big Five different from a 16-type test?
A 16-type test sorts you into a category, which is easy to remember and easy to share. The Big Five sorts you into nothing and hands you an exact percentage on five dimensions instead. Personality runs as a spectrum: 52 percent extraverted and 91 percent extraverted both get called an extravert by a type test, and the Big Five tells you honestly how far apart those two are.
Is low Emotional Stability a bad result?
It is a widely held misreading. Low Emotional Stability (high Neuroticism in the original literature) means a finely tuned emotional radar: you register risk earlier, you feel other people's pain more accurately, and you tend to be more sensitive to art and to detail. Many makers and many carers sit here. What it asks for is care rather than repair. This test presents it as a trait plus how to look after it, and makes no medical or clinical assessment of any kind.
Is the full result free?
Yes. All five exact percentages, the radar chart, the per-dimension write-up and the dominant-pair reading are free, with no sign-up. If you want to go deeper there is an optional Deep Analysis at NT$399: an AI-written personal read built from your own five percentages, covering career direction, how you relate to people, and how to look after yourself under pressure. It needs no birth data, only the answers you just gave.
Where do the questions come from?
All 50 items are the IPIP (International Personality Item Pool) Big Five markers from Goldberg (1992), a public-domain, validated item bank and one of the most widely used Big Five instruments in research worldwide. This English version uses the original IPIP wording.
The Big Five has no founding figure. It is what a series of researchers kept pulling out of ordinary language: take every adjective people use to describe each other, run the factor analysis, run it again, and five dimensions keep settling out. That is what separates it from most personality systems. The data came first, and the five names came after.
Goldberg, L. R. (1992). The development of markers for the Big-Five factor structure. Psychological Assessment, 4(1), 26–42.
Costa, P. T., & McCrae, R. R. (1992). Revised NEO Personality Inventory (NEO-PI-R) and NEO Five-Factor Inventory (NEO-FFI) professional manual. Psychological Assessment Resources.
John, O. P., & Srivastava, S. (1999). The Big Five trait taxonomy: History, measurement, and theoretical perspectives. In L. A. Pervin & O. P. John (Eds.), Handbook of personality: Theory and research (2nd ed., pp. 102–138). Guilford Press.
Goldberg, L. R., Johnson, J. A., Eber, H. W., Hogan, R., Ashton, M. C., Cloninger, C. R., & Gough, H. G. (2006). The International Personality Item Pool and the future of public-domain personality measures. Journal of Research in Personality, 40(1), 84–96.
Limits: this is a self-report scale, so what it measures is how you are willing to describe yourself today. It cannot see you through anyone else's eyes, and it cannot see how you behave in every different room. Scores on all five dimensions drift slowly with age and circumstance, so none of this is a fixed label.
The items on this page are the original IPIP public-domain wording. Treat the result as a starting point for understanding yourself. It is not suitable for hiring, screening, or judging anybody else.