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Scientific Reading Comprehension Flashcards

7 cards from real OAT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Scientific Reading Comprehension flashcards as text

  1. A passage states: 'The researchers found a statistically significant inverse correlation (r = -0.78, p < 0.01) between intraocular pressure and retinal ganglion cell density.' What does this mean?

    Answer: Higher IOP is associated with lower ganglion cell density

    An inverse correlation means as one variable increases the other decreases, so higher IOP is associated with lower RGC density.

  2. A study abstract reports a 95% confidence interval of [2.1, 4.3] mmHg for mean IOP reduction. Which conclusion is most appropriate?

    Answer: There is 95% probability the true mean reduction is between 2.1 and 4.3 mmHg

    A 95% CI means we are 95% confident the true population mean lies within that interval.

  3. A passage describes a double-blind randomized controlled trial comparing two contact lens solutions. The primary advantage of double-blinding in this context is:

    Answer: Neither subjects nor evaluators know which solution is being tested, reducing bias

    Double-blinding prevents both participants and assessors from knowing treatment assignments, minimizing placebo and observer bias.

  4. A graph in a passage shows corneal thickness (y-axis) plotted against age (x-axis) with a shallow negative slope. The most accurate interpretation is:

    Answer: Corneal thickness tends to decrease slightly as age increases

    A negative slope indicates an inverse trend, but scatter means individual values vary; correlation does not imply causation.

  5. A research passage uses the term 'sensitivity' in the context of a diagnostic test for diabetic retinopathy. Sensitivity refers to:

    Answer: The test's ability to correctly identify patients who have the disease

    Sensitivity (true positive rate) measures how well a test detects disease among those who actually have it.

  6. A passage states that a new optic nerve imaging device has a specificity of 92%. This means:

    Answer: 92% of healthy individuals correctly test negative for glaucoma

    Specificity is the proportion of truly disease-free individuals who receive a negative test result.

  7. A passage compares three treatment groups using an ANOVA test with p = 0.03. The correct interpretation is:

    Answer: At least one group mean differs significantly from the others at α = 0.05

    ANOVA tests whether any group means differ; a significant result only indicates at least one difference exists, requiring post-hoc tests to identify which.