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

yellow and green, its removal would remove a discriminating variable for schizophrenics,
and in combination, intensity may contribute to the qualitative interpretation of the
structural variables. It would probably be better to incorporate it into a reduced colour
list.
Differences between groups - Line quality
Older studies mention thick heavy line for patients, especially schizophrenics 318 . In the
DAPA study, thick line was notably absent: if thick lines were scored, they were
swamped by the lower scores in the production of averages, which seems likely because
there were inconsistencies in homogeneity of scores for painted lines within groups 319 .
Contemporary studies tend to show no differences between diagnostic groups on line
quality 320 , and the results from the DAPA agree insofar as they show there was a limited
range of line for all groups for both types of line, but the DAPA did pick up differences
in this limited range. The distribution statistics suggested little use of painted or drawn
line but the information is ambiguous because there is little difference between DAPA
measures of few lines and thin lines. The confidence intervals for all groups in painted
318
Amos (1982), op.cit. schizophrenics with prominent paranoid tendencies, produce drawings with heavy
overall line emphasis, p.135.
319 The Levene statistic was not computable because painted line was infrequently used in some groups.
Bartletts box (table 8, results) put scores for painted line just within the range for discrimination
purposes.
320 Gantt (1990), op.cit. found no differences in 4 groups of patients and a control group in line quality;
the DDS, Cohen et al. (1988), op.cit. found no differences in 3 types of patients to controls; Langevin et
al. (1975) op.cit. found no differences in schizophrenics and normal controls and Miljkovitch et al. (1982),
op.cit. found no differences in line with schizophrenics and other patients.
294