<p><strong>IPIP Scales:</strong>
The IPIP scales are in the public domain: <a href="https://ipip.ori.org/" rel="nofollow noreferrer">https://ipip.ori.org/</a>
They are intended to have no restrictions on use (see <a href="https://ipip.ori.org/newPermission.htm" rel="nofollow noreferrer">https://ipip.ori.org/newPermission.htm</a> ).
See in particular, the section on <a href="https://ipip.ori.org/newMultipleconstructs.htm" rel="nofollow noreferrer">multi-construct inventories</a>. I think the most popular Big Five measures would be</p>
<ul>
<li><a href="https://ipip.ori.org/BFASKeys.htm" rel="nofollow noreferrer">Big Five Aspects Scale</a>: It has 100 items and measures the Big Five as well as 2 aspects per Big Five. It's a nice compromise between just measuring the Big Five and the much longer facet-level measures (e.g., NEO PI R, IPIP NEO 300, etc.)</li>
<li><a href="https://ipip.ori.org/newBigFive5broadKey.htm" rel="nofollow noreferrer">Goldberg's IPIP 50</a>.</li>
<li><a href="https://ipip.ori.org/newNEODomainsKey.htm" rel="nofollow noreferrer">IPIP NEO 50</a></li>
<li><a href="https://ipip.ori.org/newNEOFacetsKey.htm" rel="nofollow noreferrer">IPIP NEO 300</a>. This is modelled on the NEO PI R. So it measures 30 facets as well as the Big Five that are designed to be similar to the NEO PI R.</li>
</ul>
<p>A major difference between Goldberg's IPIP 50 and IPIP NEO 50 is the openness factor. For Goldberg it is intellectance (i.e., intellectual engagement and self-rated intellect), whereas IPIP NEO 50 is openness to experience (i.e., some intellectual engagement, but also creative interests, unconventionality, etc.).</p>
<p><strong>LEFFI</strong>: The <a href="https://osf.io/kfz28/wiki/home/" rel="nofollow noreferrer">Less Evaluative Five Factor Inventory</a> is a new measure that is explicitly in the Public Domain (disclosure: it was developed by  Joshua Wood and me). It is designed to have lower levels of item-level social desirability than some measures of the Big Five.</p>

CC BY-SA 4.0
2019-06-13T00:45:06.600Z
2021-10-07T23:04:39.350Z
2021-10-07T23:04:39.350Z
Jeromy Anglim
<p>I am currently working on a project with a few students. It's an app that can test the big 5 personality test. The problem is, I am having trouble finding one that is under an open license and that we could use. We are currently using a free non-commercial use for research purposes, but we are starting to explore the possibility of using it commercially one day. </p>

<p><strong>Please list even ones that we might have to pay for.</strong></p>

CC BY-SA 4.0
2019-02-14T10:59:52.403Z
I answered a related question https://psychology.stackexchange.com/questions/18247/canonical-literature-for-big-5-personality-theory/18268#18268
hexadecimal
<neuroscience><cognitive-neuroscience><personality><behavior><big-five>
Is there a Big Five personality assessment under an open-commercial license?
chris dieumerci
# Is there a Big Five personality assessment under an open-commercial license?

(Asked by: username_0 on 2019-02-09)

I am currently working on a project with a few students. It's an app that can test the big 5 personality test. The problem is, I am having trouble finding one that is under an open license and that we could use. We are currently using a free non-commercial use for research purposes, but we are starting to explore the possibility of using it commercially one day.

**Please list even ones that we might have to pay for.**

**Tags:** neuroscience, cognitive-neuroscience, personality, behavior, big-five

> **Comments:**
> **username_1**: I answered a related question https://psychology.stackexchange.com/questions/18247/canonical-literature-for-big-5-personality-theory/18268#18268  

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## 1 answers

### Answer by username_2 on 2019-06-13. Score: 3

**IPIP Scales:**
The IPIP scales are in the public domain: <https://ipip.ori.org/>
They are intended to have no restrictions on use (see <https://ipip.ori.org/newPermission.htm> ).
See in particular, the section on [multi-construct inventories](https://ipip.ori.org/newMultipleconstructs.htm). I think the most popular Big Five measures would be

* [Big Five Aspects Scale](https://ipip.ori.org/BFASKeys.htm): It has 100 items and measures the Big Five as well as 2 aspects per Big Five. It's a nice compromise between just measuring the Big Five and the much longer facet-level measures (e.g., NEO PI R, IPIP NEO 300, etc.)
* [Goldberg's IPIP 50](https://ipip.ori.org/newBigFive5broadKey.htm).
* [IPIP NEO 50](https://ipip.ori.org/newNEODomainsKey.htm)
* [IPIP NEO 300](https://ipip.ori.org/newNEOFacetsKey.htm). This is modelled on the NEO PI R. So it measures 30 facets as well as the Big Five that are designed to be similar to the NEO PI R.

A major difference between Goldberg's IPIP 50 and IPIP NEO 50 is the openness factor. For Goldberg it is intellectance (i.e., intellectual engagement and self-rated intellect), whereas IPIP NEO 50 is openness to experience (i.e., some intellectual engagement, but also creative interests, unconventionality, etc.).

**LEFFI**: The [Less Evaluative Five Factor Inventory](https://osf.io/kfz28/wiki/home/) is a new measure that is explicitly in the Public Domain (disclosure: it was developed by Joshua Wood and me). It is designed to have lower levels of item-level social desirability than some measures of the Big Five.


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