There are many types of work that mainly create benefit by thinking, often called desk jobs.
The output is based on the cognitive abilities of the person.
It typically happens in an environment we call office.
A working person has some amount of cognitive abilities. They are certainly multidimensional, but that has no relevance here.
There are things that can reduce these abilities. Some of them are obvious, but it would be interesting to know all that are important for a common desk job. I assume there are not so many of them that this becomes a list question. Many of them are obvious, but I assume there are others.
Obvious are for example:
- External distraction by unrelated activities of others
Some points or classes where it is not obvious are:
- Maybe some types of mental illness? Major depression seems likely?
- Possibly external physical influences like freezing?
There are certainly unusual points applying only to few people, for example a person extremely distracted by harsh light. These are interesting, of course, but I mainly think of common things.