In my posting immediately above (Found It!), I mistakenly wrote in the last parapgraph that ONLY when a therapist is in doubt about what kind of test is happening would s/he want to interpret based on the presumption of a transference test. The word ONLY reflects a leakage of my tendency to be dogmatic at times.
Just a few paragraphs above in the quote from Foreman (p. 120) is mentioned at least one other time when this would be a preferred choice for a therapist. Thus Foreman referred to not just confusing tests but to MIXED tests as occasions when a therapist would be advised to risk error on the side of failing passive-to-active tests. Risking error on the side of failing a passive-to-active test is being regarded by me to imply being willing to assume a transference test when making interpretations. But I suppose it may be possible to regard the notion of error in failing passive-to-active testing as implying other things, too, such as the therapist making no interpretation. Perhaps somone could suggest another possible implication that I have not thought of.