Practice Test Geeks(CET) Certified Echocardiography Technician Practice Test
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Research Methods & Evidence-Based Practice Flashcards

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

Read the first 7 Research Methods & Evidence-Based Practice flashcards as text

  1. Which form of bias occurs when echocardiographers who know a patient's diagnosis subconsciously measure LVEF differently than those who are blinded?

    Answer: Observer/detection bias

    Observer (detection) bias occurs when knowledge of exposure or disease status influences how measurements are made or recorded.

  2. When translating research evidence into echocardiographic practice, which factor addresses whether study findings apply to a specific patient population?

    Answer: External validity (generalizability)

    External validity (generalizability) refers to how well study findings apply to patients outside the specific study population.

  3. A researcher tests the same echocardiographic measurement on 30 patients twice, two weeks apart. Which statistic evaluates test-retest reliability?

    Answer: Intraclass correlation coefficient (ICC)

    The ICC is the standard statistic for quantifying test-retest (intraobserver) reliability of continuous measurements over repeated sessions.

  4. In literature, forest plots from a meta-analysis on echo-guided resynchronization therapy show most confidence intervals crossing the line of no effect. What does this suggest?

    Answer: Pooled evidence does not convincingly demonstrate a significant effect

    Confidence intervals crossing the line of no effect (usually 0 or 1) indicate results are not statistically significant, suggesting uncertain or no clear benefit.

  5. Which practice best exemplifies a CET integrating the three pillars of evidence-based practice when updating a TEE protocol?

    Answer: Combining research evidence, clinical expertise, and patient values and preferences

    EBP integrates the best available research evidence with clinician expertise and individual patient values to guide decision-making.

  6. A CET reads a study concluding that tissue Doppler E/e' ratio predicts outcomes in heart failure (p=0.03, HR=1.8, 95% CI 1.1–3.0). What should the CET consider regarding clinical significance?

    Answer: The effect size and confidence interval must be evaluated alongside the p-value

    Clinical significance requires evaluating effect size (HR=1.8) and precision (CI) in addition to statistical significance (p-value) to determine practical importance.

  7. Which publication bias phenomenon refers to studies with positive results being more likely to be published than those with null findings in echocardiographic research?

    Answer: The file drawer problem

    The 'file drawer problem' describes the tendency for null or negative studies to go unpublished, distorting the literature toward positive results.