Bachelor thesis or Bachelor's thesis

Solution 1:

First off, I would mimic the term that your university uses. Does that give you a satisfactory resolution? (Or are they inconsistent in their use?)

If not, do you use the full term "Bachelor of Arts" or "Bachelor of Science" in your thesis title? If so, you don't need the apostrophe s (and you should capitalize the words as indicated). However, if you are referring to the degree program more informally, then I think you should use "bachelor's thesis." (See this Wikipedia entry in which bachelor's is used throughout.)

Also, the Associated Press Styleguide has these guidelines for Academic Degrees:

• Use an apostrophe in bachelor’s degree, a master’s, etc.
• There is no apostrophe in Bachelor of Arts or Master of Science.

I think that would apply to bachelor's thesis as well.

Solution 2:

In some countries/universities, the word "thesis" or a cognate is used as part of a bachelor's or master's course, while "dissertation" is normally applied to a doctorate, while in others, the reverse is true.

In USA and Canada,

• Research-based papers presented as the final empirical study of a bachelor with honours (honors) degree are normally called bachelor thesis or honours thesis (in USA, "thesis" is in more commonly use).
• Major papers presented as the final project for a master's degree are normally called thesis.
• Major papers presenting the student's research towards a doctoral degree are called theses or dissertations.

In Germany,

• A bachelor's thesis is often 40–60 pages long, other theses are usually even longer.
• The required submission for the doctorate is called a Dissertation or Doktorarbeit.