Hey smile22,
Thanks for your question! This is a fairly rare Assumption—PR question stem, not a Justify—PR stem, because it asks us to identify a principle that must be assumed in order for the conclusion to be properly drawn. Since “must” is a necessary condition indicator, the correct answer will be principle upon which the argument depends. By contrast, a Justify—PR question would have required us to identify a principle, which, if assumed, would enable the conclusion to be properly drawn, i.e. a principle sufficient to prove the conclusion.
The psychologist’s argument is structured as follows:
Premise: - Psychotherapists who attempt to provide psychotherapy on talk shows are expected to entertain a broad audience.
Premise: - Satisfying this demand is nearly always incompatible with providing high-quality psychological help.
Conclusion: - Psychotherapists should never provide psychotherapy on talk shows.
As a general rule, when prephrasing a principle to answer any Help Family question, look for logical gaps or deficiencies in the argument that need to be fixed. In this problem, the author argues that psychotherapy should never be provided on talk shows because such therapy is
unlikely to be of high quality (“satisfying this demand is nearly always incompatible with providing high-quality psychological help”). This line of reasoning is certainly objectionable: even if talk shows fail to provide the ideal context for psychological help, one could argue that for some people substandard psychotherapy is better than none.
To identify a principle upon which the argument depends, we must establish that therapy should never be provided in a context in which it is unlikely to be of high quality. Answer choice (E) fits the bill. To double-check if this is an assumption, apply the Assumption Negation Technique—logically negate the answer and ask yourself if the following statement would undermine the argument:
Psychotherapists can sometimes attempt to provide psychological help even if the manner in which such help is provided makes it unlikely to be of high quality.
Since the logical opposite of this answer choice directly undermines the conclusion of the argument, answer choice (E) contains an assumption upon which the argument depends.
Now, let's take a look at answer choice (C). This is an attractive answer choice, especially if one misreads the question stem. Indeed, if we adopt the principle that psychotherapy should never be provided in a context in which there is
any chance that the therapy might of less than high quality, the author would be justified in reaching her conclusion. After all, therapy on talk shows is “nearly always” of less than high quality, which would certainly meet the standard set forth in answer choice (C).
Unfortunately, this principle is not an
assumption upon which the conclusion depends. It simply sets the bar for finding psychotherapy objectionable too low. To double-check if this is an assumption, apply the Assumption Negation Technique—logically negate the answer and ask yourself if the following statement would undermine the argument:
Psychotherapy can sometimes be provided in a context in which there is some chance that the therapy might be of less than high quality.
The author would reply by observing that talk shows pose a substantially higher chance that the therapy provided on them would be of less than high quality. Since the logical opposite of answer choice (C) does not weaken the conclusion of the argument, it is not an assumption upon which the argument depends.
Generally speaking, the correct answer to an Assumption question will not go too far: it must be a statement upon which the conclusion
depends, not a statement that
proves the conclusion. An assumption can be considered a “minimalist” answer, and cannot contain exaggerations or elements that are extraneous to the argument.
Hope this helps!