Big Five vs 16 types: which personality test should you take?

They are not rival answers to the same question. One measures, the other sorts. Knowing which is which makes both far more useful. You can take the Big Five personality test or the 16-type personality test in under ten minutes each.

The Big Five is the five-factor model used in personality research. It describes you along five broad traits:

• Openness: how much you go looking for new ideas, art, flavours and ways of doing things.
• Conscientiousness: how much you plan, finish and keep your promises to your future self.
• Extraversion: how much energy you get from people, noise and activity.
• Agreeableness: how much you lean towards warmth, trust and keeping the peace.
• Emotional sensitivity: how strongly you feel worry, stress and the dips of a bad day.

Each trait is a dial, not a switch. You do not "have" openness or lack it. You sit somewhere along the line, and your result shows where as a percentile, so you can see how you compare with other people who have taken the test.

Our version is fifty questions and takes about eight minutes. It is our own questionnaire, built on the five-factor model, and it gives you five percentiles plus one of 32 profiles that sums up your highs and lows in a sentence. Each trait has its own page if you want to go further, starting with openness and emotional sensitivity.

The 16-type model asks four questions about preference and gives each answer a letter:

• E or I: do you recharge with people (Extraversion) or on your own (Introversion)?
• S or N: do you trust concrete detail (Sensing) or patterns and possibilities (Intuition)?
• T or F: do you decide by logic first (Thinking) or by people and values first (Feeling)?
• J or P: do you like things settled (Judging) or open (Perceiving)?

Put the four letters together and you get a type such as INTJ or ENFP. Each type is a recognisable character, and that is the appeal. Saying "I'm an INFJ" tells a friend something in four letters that would otherwise take a paragraph.

Our 16-type test is forty pairs of statements and takes about six minutes. You pick the side that sounds more like you, and we score each pair as a spectrum from 0 to 100 rather than a hard yes or no.

Here is the part most people miss. Personality traits are spread out like height. Most people sit somewhere near the middle, with fewer at the extremes. The Big Five reports that honestly: if you are a little more organised than most, you get a percentile that says exactly that.

A type system draws a line down the middle of each spectrum and puts you on one side. That is wonderful for clarity and storytelling. It is less precise when you sit near the line. Someone who is barely introverted and someone who is deeply introverted both get an I, even though their weekends look completely different.

So the 16 types answer "what kind of person am I?" with a vivid portrait. The Big Five answers "how much of each trait do I have?" with a measurement. Both are useful questions.

If you have ever taken a type test twice and got two different results, this is why. When a preference sits near the middle, a small change in mood on the day can flip the letter.

We handle that directly. On the 16-type test, any pair that scores between 40 and 60 is marked close to the line, and your result shows both possible types. If you are an INTJ who is nearly an INTP, you will see both, and you can read the two profiles and decide which one fits your actual life.

If several of your letters are close calls, that is a strong sign the Big Five will suit you better. A dial has no line to fall either side of.

Pick by what you want to do with the answer.

• You want to understand yourself in detail. Start with the Big Five. It is the one to use if you are thinking about how you work, how you handle stress, or why certain people wear you out.
• You want something to talk about. Start with the 16 types. It is quicker to explain, easier to remember, and brilliant for comparing with a partner, a friend or a group chat.
• You are making a decision about work. Take the Big Five, then pair it with the career interest test. Traits tell you how you work. Interests tell you what you want to work on.
• You already know your four letters. Take the Big Five to see the shades your type flattens. Many people find their type makes more sense once they see which traits are strong and which are mild.

The two models overlap more than they compete. Extraversion appears in both. Openness lines up closely with the S and N preference: people high in openness tend to come out as N. Agreeableness often tracks the T and F preference, and conscientiousness tends to sit behind J and P.

Emotional sensitivity is the one the 16 types leave out. It is often the trait that explains the most about a hard week, which is a good reason to take the Big Five even if you love your type.

A good way to use both: let your four letters be the headline, and let your Big Five percentiles be the detail underneath. "I'm an ENTP, high in openness, middling in extraversion, low in conscientiousness" says a great deal about how you will run a project, and how often you will need reminding of the deadline.

When you are ready, take the Big Five personality test, then try the 16-type personality test and see where the two agree.