Whats's the difference between container-title and volume-title?
https://docs.citationstyles.org/en/v1.0.2/specification.html#standard-variables
container-title
Title of the container holding the item (e.g. the book title for a book chapter, the journal title for a journal article; the album title for a recording; the session title for multi-part presentation at a conference)
volume-title
Title of the volume of the item or container holding the item;
Also use for titles of periodical special issues, special sections, and the like
But what's the difference?
I think a possible explanation could be here:
issue
"Issue number of the item or container holding the item (e.g. “5” when citing a journal article from journal volume 2, issue 5); Use volume-title for the title of the issue, if any"
But the sentence isn't completed!?
container-title
Title of the container holding the item (e.g. the book title for a book chapter, the journal title for a journal article; the album title for a recording; the session title for multi-part presentation at a conference)
volume-title
Title of the volume of the item or container holding the item;
Also use for titles of periodical special issues, special sections, and the like
But what's the difference?
I think a possible explanation could be here:
issue
"Issue number of the item or container holding the item (e.g. “5” when citing a journal article from journal volume 2, issue 5); Use volume-title for the title of the issue, if any"
But the sentence isn't completed!?
That would for example, be for a titled special issue of a journal. volume-title is also used, as per the description, for individual volumes in a multi-volume work. While it's rare, these works can also have container titles -- so the title of the chapter would be title, the title of the individual volume it's in would be volume title, and the entire work's title would container-title, but even if not, titles of volumes would be cited differently.
According to my understanding this would be the collection-title, isn't it?
(In rare cases, a multi-volume work can also be part of a series; we may even have an example of that somewhere).
title: Test validity
container-title: APA handbook of testing and assessment in psychology
volume: 1
volume-title: Test theory and testing and assessment in industrial and organizational psychology
collection-title: APA handbooks of psychology
https://www.apa.org/pubs/books/4311510?tab=2