<p>The <a href="https://ipip.ori.org/" rel="nofollow noreferrer">International Personality Item Pool</a> would be a great place to start.</p>

CC BY-SA 4.0
2021-08-23T11:37:03.430Z
IPIP is a great project but I doubt that it is used the most. For instance, the IPIP-NEO-120 was cited 359 times, the NEO-PI-R about 38k times (google scholar).
Johannes Titz
CC BY-SA 4.0
2021-01-22T03:26:26.087Z
2021-01-22T03:26:26.087Z
Tony Mobbs
<p>I studied Psychology some years ago and ended up as a programmer. Now, I'm working on a personal side project to build an API to serve correction for different psychology tests.</p>
<p>Since I moved out of the field for so many years, I'm having a hard time finding quantitative instruments to evaluate different aspects of the human psychology: personality, resilience, control locus etc...</p>
<p>All the tests must be reliable (they are precise and achieve to measure what they want to, backed up by studies), up-to-date and frequently used among professionals.</p>
<p>Thanks in advance.</p>

CC BY-SA 4.0
2021-01-27T02:23:44.733Z
Welcome to psych.SE.  This question may be too broad for this forum.  Maybe if there is a reasonable way to set objective criteria for "reliable", "up to date", and "frequently used", then the question can be acceptable here, but as-is, it is too open to interpretation, and would require an answer that is far too long.
Arnon Weinberg
<measurement><test>
Updated list of the most used and reliable quantitative tests in Psychology
Carlos Molero
# Updated list of the most used and reliable quantitative tests in Psychology

(Asked by: username_0 on 2021-01-21)

I studied Psychology some years ago and ended up as a programmer. Now, I'm working on a personal side project to build an API to serve correction for different psychology tests.

Since I moved out of the field for so many years, I'm having a hard time finding quantitative instruments to evaluate different aspects of the human psychology: personality, resilience, control locus etc...

All the tests must be reliable (they are precise and achieve to measure what they want to, backed up by studies), up-to-date and frequently used among professionals.

Thanks in advance.

**Tags:** measurement, test

> **Comments:**
> **username_1**: Welcome to psych.SE.  This question may be too broad for this forum.  Maybe if there is a reasonable way to set objective criteria for "reliable", "up to date", and "frequently used", then the question can be acceptable here, but as-is, it is too open to interpretation, and would require an answer that is far too long.  

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## 1 answers

### Answer by username_2 on 2021-01-22. Score: 1

The [International Personality Item Pool](https://ipip.ori.org/) would be a great place to start.

> **Comments:**
> **username_3**: IPIP is a great project but I doubt that it is used the most. For instance, the IPIP-NEO-120 was cited 359 times, the NEO-PI-R about 38k times (google scholar).  

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