The relationship between the various perception variables and the implied causative environmental parameters was investigated using Pearson correlation coefficients. All the coeffi-
cients reported in the following sections are significant at the
0.05 level or better. The effect of confounding parameters was also
investigated using partial correlation coefficients and cross-tabs, as
well as chi-squared tests against equiprobability. Finally, ordinal
regression based on a logit probability model, was used to quantify
the relevance of the various parameters with respect to the