The ROCF assesses perceptual organization and visual memory. The Developmental Scoring System "allows the examiner to objectively evaluate ROCF performance within a developmental context and to determine the age-appropriateness of the child's Copy and Recall productions.
The DSS-ROCF measures not only the child's ability to accurately reproduce the figure, but also the child's qualitative, organizational, and stylistic approaches to the figure."
On the Psychological Assessment Resources (PAR) website (www.parinc.com), it states: "DSS-ROCF measures four parameters of ROCF performance:
Organization, Style, Accuracy, and Errors. Age-referenced norms for these four parameters provide guidelines for determining the developmental appropriateness of a child's production. The Organization score quantifies the child's appreciation for the organizational goodness of complex, visually represented materials. The Style rating objectively categorizes the child's approach to information processing as Part-oriented, Intermediate, or Configurational.
The Accuracy score quantifies the actual ROCF elements that are accurately reproduced (independent of Organization and
Style).
The Error score quantifies the extent to which elements are distorted (rotation, perseveration, misplacement, and conflation).”
The complexity of the ROCF makes it a very rich source of hypotheses for the clinician.
The same complexity makes creating a scoring system a psychometric challenge (the user
will note, for example, the size--and thus overlap--of the standard deviations around the
Organization scores).
In developing the DSS we had to choose between clinical utility and psychometric rigor, and
erred on the side of the former. In the clinical setting, the instrument does not (and should
not be taken to) function as a population-standardized measurement tool. Rather, the
clinician should use it to anchor him or herself in "developmental space," so to speak, to
avoid making inferences about cognitive or (especially) neuropsychological malfunctioning
on the basis of behavioral observations that are in fact developmentally appropriate (see the
DSS-ROCF) manual for discussion.
In the research context, not only the Organization score but also the Accuracy scores
(indexing structural versus incidental elements) have been very useful in group
differentiation.