Stucked with the IV, DV and levels of a difference study

I am asked what are the DV, IV and variables of IV for a dependent groups from a difference study.

Here are the details of my coursework:

The psychological construct of individual lability has gained great interest within individual
differences research. It is proposed that individual lability is the opposite of ‘stability’ within
various psychological, cognitive, emotional, and physiological functions resulting in an ‘ease
of change’ (Stanford, 1978; Braud, 1980). However, at this time, it is unclear if individual
lability is impacted by sex differences. Therefore, the aim of the current study is to explore
possible sex differences in individual lability, assessed by the Revised Lability Scale (RLS),
(Drennan, Roe, & Collings, 2015), using a sample of one hundred participants (N = 100).

I hate to be stucked in this but I am asked what are the DV, IV and levels of IV...

This is what I think:
DV= sex differences in individual lability
IV= Revised Lability Scale
levels of IV= none...?

Am I wrong? What do you guys think?

Thank you!