Does "effects of labelling on public attitudes" mean "effects that..."?

Does "effects of labelling on public attitudes" mean "effects that the public put the label (of mental illness) "?

Context:

The stigma of mental illness: effects of labelling on public attitudes towards people with mental disorder

Angermeyer MC, Matschinger H. The stigma of mental illness: effects of
labelling on public attitudes towards people with mental disorder.
Acta Psychiatr Scand 2003: 108: 304–309.
BlackwellMunksgaard 2003.
Objective: Aim of the study is to examine the impact of labelling on
public attitudes towards people with schizophrenia and major
depression.
Method: In Spring 2001, a representative survey was carried out in
Germany involving adults of German nationality (n ¼ 5025).
Results: Labelling as mental illness has an impact on public attitudes
towards people with schizophrenia, with negative effects clearly
outweighing positive effects. Endorsing the stereotype of
dangerousness has a strong negative effect on the way people react
emotionally to someone with schizophrenia and increases the
preference for social distance. By contrast, perceiving someone with
schizophrenia as being in need for help evokes mixed feelings and
affects people’s desire for social distance both positively and
negatively. Labelling has practically no effect on public attitudes
towards people with major depression.
Conclusion: Our findings illustrate the need for differentiation,
differentiation between the different components of stigma as well as
differentiation between the various mental disorder