PCB Research & Evidence-Based Practice 2

Question 1

Which research design is best suited for establishing a causal relationship between an intervention and an outcome in PCB design practice?

Accepted Answer

Randomized controlled trial

Answer

Randomized controlled trials (RCTs) use random assignment to minimize confounding variables, making them the gold standard for establishing causation.

Question 2

A practitioner wants to summarize and synthesize findings from multiple primary studies on a topic. Which type of research product is most appropriate?

Accepted Answer

Systematic review or meta-analysis

Answer

Systematic reviews and meta-analyses pool data across multiple studies to provide the highest-level summary of evidence on a question.

Question 3

In evidence-based practice, the term 'internal validity' refers to which of the following?

Accepted Answer

The extent to which observed outcomes are due to the intervention rather than extraneous factors

Answer

Internal validity reflects the confidence that changes in the dependent variable were caused by the independent variable, not by confounds.

Question 4

A practitioner adopts an intervention that has strong research support but modifies it significantly for local use. What critical step should follow?

Accepted Answer

Monitor client outcomes systematically to evaluate effectiveness of the modified approach

Answer

When an evidence-based practice is adapted, systematic outcome monitoring is essential to determine whether the modified version remains effective.

Question 5

Which statistical concept indicates the probability that a study's results are due to chance rather than a true effect?

Accepted Answer

p-value

Answer

The p-value represents the probability of observing results at least as extreme as those found, assuming the null hypothesis is true.

PCB - Design Practice Test

PCB - Design Practice Test

PCB Research & Evidence-Based Practice 2