Notably, if nervousness is the cause, then this "accent" need not be present whenever she is acting, since she would be speaking scripted lines.
Interestingly Fordstaff noticed the "accent" in Mammoth where she got scripted lines too. And I think she speaks a bit strangely in some TSCC episodes too( I'm saying it so take it for what it is).
Good question. "Accent" is defined as A distinctive mode of pronunciation of a language. Whether you want to call what we are talking about an "accent" depends on whether you would allow the definition of the term "accent" to include the effect that has been identified. It's semantics.
Identifiable differences in pacing and cadence can fall under the definition of accent. The term "Southern drawl" refers in part to pacing and the elongation of certain syllables, and it is commonly accepted as a form of accent.
Suppose I told you that my voice takes on a Brooklyn accent whenever I am nervous. Would that mean that my Brooklyn accent is not an accent? I mean, is the cause of my accent a good reason to say that it is not an accent? I don't know -- you could define it any way you want.
I suppose your are right. I asked because when I met with this word it was always about regional differences in languages however I read a bit and I found too that its not necessarily true. So we can call it an "accent" I think.