The psychopathology of everyday art: a quantitative Study - World ...

appendix 2) and these were left in their original state along with those that showed
homogeneity in the Levene tests: green, blue, space (table 4 below).
Transformed variables
6 variables were successfully transformed: red, yellow, brown, painted 285 and drawn line,
form, (tables and figures 3a-f, appendix 2). Levene calculations for homogeneity
appear in table 5 above.
To summarise, twelve variables which remained in the final analysis, transformed
or not (tables 2a-f and 3a-f). Two variables, Purple (see table/fig. 1d, appendix 2) and
White (1h, appendix 2), were dropped at this stage for 2 reasons; (1) their values were
not plottable because of insufficient use, and (2) homogeneity tests within the analysis
of variance (Bartletts-Box, detailed later in this chapter, table 8) showed their range was
unacceptable. Plots of their standardised differences (plots 7b and c,) showed
concentration of cases below the mean. White was obviously irredeemable; the plot (7a,
appendix 2) showed concentrations at 0 for all groups. Purple however (7b), looked more
promising: although there were concentrations below the mean (at very low levels) for
most groups, group 4 showed a wider scatter of differences. Cutting off all values of
Purple above 0.28 (9 cases) did not redeem the median from negative but Bartletts-Box
showed acceptable homogeneity (F = 1.751; p=0.136). However, all previous
significance disappeared when the ANOVA was calculated (F = 1.81; p=0.132). These
285 Painted line was retained because, although the square root transformation of Painted Line had a
negative median, the calculation for the Bartletts Box test (table 8) placed the variance within acceptable
levels.
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