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.