4. Identify the independent and dependent variables, including how each is defined.

On the surface, this study merely seeks to test two separate correlations (between self-perception and metaperception and between metaperception and other-perception, respectively), and so can be considered to have all "independent" variables; causation (dependence) is not technically an issue.

However, given the larger SIT framework the authors are employing, self-image (self-perception) is viewed as dependent on perceptions of how the subject is perceived by others (metaperception), which are in turn dependent on the way others actually perceive the subject (other-perception).

5. Describe at least 2 findings from this study.

The study revealed that while (1) adolescents and young adults tend to view themselves in similar terms to the way they believe...

However, this correlation was less strong where assertiveness was concerned, and among adolescents the correlation for firmness was actually negative.
Cooperativeness was also the most significant dimension of correlations between metaperceptions and other-perceptions. Otherwise, the subjects' sense of how their parents perceive them was not especially accurate.

References

Cook, W.L. & Douglas, E.M. (1998). The looking-glass self in family context: A social relations analysis. Journal of Family Psychology 12(3), 299-309.