Slideshow Videos Research & Evidence-Based Practice 4

Question 1

In evidence-based practice, which step comes AFTER formulating a clinical question?

Accepted Answer

Search for the best available evidence

Answer

The EBP process follows: Ask → Acquire evidence → Appraise → Apply → Evaluate; searching for evidence is the second step.

Question 2

What does the term 'statistical power' refer to in research?

Accepted Answer

The ability of a study to detect a true effect when one exists

Answer

Statistical power is the probability that a study will detect a true difference or effect when one actually exists (1 - β).

Question 3

Which of the following BEST describes a cross-sectional study?

Accepted Answer

Data on exposure and outcome are collected at the same point in time

Answer

A cross-sectional study measures both exposure and outcome simultaneously, providing a snapshot of a population at one time point.

Question 4

A p-value of 0.03 means:

Accepted Answer

There is a 3% probability of observing results this extreme if the null hypothesis were true

Answer

A p-value represents the probability of obtaining results at least as extreme as observed, assuming the null hypothesis is true.

Question 5

What is a limitation of using expert opinion as evidence in clinical practice?

Accepted Answer

It is subject to individual bias and may not reflect current data

Answer

Expert opinion sits at the lowest level of evidence because it is vulnerable to personal bias and may not be based on rigorous research.

Slideshow Videos Practice Test