Reading Comprehension Flashcards

A passage describes a 'double-blind, placebo-controlled trial.' What is the primary reason for blinding both participants and researchers?

Answer: To eliminate expectation bias that could influence reported outcomes and researcher assessments

Double-blinding prevents both participant expectation (placebo effect) and researcher bias from influencing the measurement and interpretation of outcomes.

A passage uses the phrase 'correlation does not imply causation' in discussing a study linking caffeine intake to reduced Parkinson's risk. What is the author's most likely intent?

Answer: To caution that the observed association does not confirm that caffeine prevents Parkinson's disease

The author warns that an observed statistical association between two variables does not establish that one causes the other, especially in observational studies.

In a PCAT passage, the author shifts from describing experimental data to discussing 'clinical implications.' What transition is occurring?

Answer: From reporting empirical findings to interpreting their real-world relevance for patient care

Transitioning to clinical implications moves the discussion from laboratory or controlled-trial data to how those findings might affect patient diagnosis, treatment, or outcomes.

A passage presents this analogy: 'Receptor binding is like a lock and key.' Which limitation of this analogy is most important to recognize?

Answer: The analogy oversimplifies dynamic conformational changes in receptors that do not occur in mechanical locks

Receptors undergo induced fit and conformational changes upon ligand binding—a complexity absent from static mechanical locks—making the analogy an oversimplification.

A passage states that a drug has a 'narrow therapeutic index.' Which reading-based inference is best supported by this phrase?

Answer: Small differences between therapeutic and toxic doses require careful dosage monitoring

A narrow therapeutic index means the toxic dose is close to the effective dose, necessitating close monitoring to keep plasma levels within the safe and effective range.

When a PCAT passage includes a table comparing five drugs across four pharmacokinetic parameters, what reading approach is most efficient?

Answer: Read the table caption first, then identify the specific row-column intersections relevant to the question asked

Reading the caption frames the table's purpose; then targeting only the relevant cells avoids wasting time processing all data when only specific comparisons are tested.

A passage concludes: 'Further research is needed to determine whether these findings generalize to pediatric populations.' What does this statement reveal about the study?

Answer: The study was conducted in adults, limiting the applicability of results to children

Calling for further research in pediatric populations implies the current study excluded children, so its conclusions cannot yet be extrapolated to that group.