
Dennis R. Preston
Fig. 1: Data presentation modes and response types sought in PD
These four modes do not exhaust the interests of PD nor the techniques
used, but they may help us focus on and evaluate what has been done and
what remains to be done. I will begin historically and in the upper right of
Figure 1 (the internal-conscious), but I will be more interested in method-
ologies, interpretations, and opportunities for future work than in a thor-
ough historical review.
Internal & Conscious
Early Dutch and Japanese studies asked folk respondents to ...