Piecemeal

It means incomplete, spotty, patchy - the findings leave open questions and things that are still not understood..

Spotty or incomplete?!which one?

They are both synonyms for piecemeal.

But both are different in meaning

Would you explain more please?

However, there remains a piecemeal quality to these findings in the context of DBD.

This is a picture of some findings that have a piecemeal quality.

What are you getting at?

I gave you a pictorial description of the expression "piecemeal quality" because you apparently did not understand the written synonyms.

The picture shows a written page of text that is incomplete, fragmented, patchy and spotty.
It is that way because it was found as part of an ancient scroll and, over time, some pieces flaked off and went missing.

We have a saying "a pictu

But I didn't understand even one word out of a thousand!

soheil1But I didn't understand even one word out of a thousand!

I can only advise you to keep studying and improving your vocabulary.

The text you linked to is very advanced and academic - it would be very difficult for native English speakers who do not have a university education in psychology or psychiatry.