Realtors rely on detailed property appraisals—conducted using appraisal tools—to assign market values to houses and other properties
Assignment: Evidence-Based Project, Part 3: Critical Appraisal of Research
Realtors rely on detailed property appraisals—conducted using appraisal tools—to assign market values to houses and other properties. These values are then presented to buyers and sellers to set prices and initiate offers.
Research appraisal is not that different. The critical appraisal process utilizes formal appraisal tools to assess the results of research to determine value to the context at hand. Evidence-based practitioners often present these findings to make the case for specific courses of action.
In this Assignment, you will use an appraisal tool to conduct a critical appraisal of published research. You will then present the results of your efforts.
To Prepare:
Reflect on the four peer-reviewed articles you selected in Module 2 and the four systematic reviews (or other filtered high- level evidence) you selected in Module 3.
Reflect on the four peer-reviewed articles you selected in Module 2 and analyzed in Module 3.
Review and download the Critical Appraisal Tool Worksheet Template provided in the Resources.
The Assignment (Evidence-Based Project)
Part 3A: Critical Appraisal of Research
Conduct a critical appraisal of the four peer-reviewed articles you selected by completing the Evaluation Table within the Critical Appraisal Tool Worksheet Template. Choose a total of four peer- reviewed articles that you selected related to your clinical topic of interest in Module 2 and Module 3.
Note: You can choose any combination of articles from Modules 2 and 3 for your Critical Appraisal. For example, you may choose two unfiltered research articles from Module 2 and two filtered research articles (systematic reviews) from Module 3 or one article from Module 2 and three articles from Module 3. You can choose any combination of articles from the prior Module Assignments as long as both modules and types of studies are represented.
Part 3B: Critical Appraisal of Research
Based on your appraisal, in a 1-2-page critical appraisal, suggest a best practice that emerges from the research you reviewed. Briefly explain the best practice, justifying your proposal with APA citations of the research.
By Day 7 of Week 7
Submit Part 3A and 3B of your Evidence-Based Project.
Submission and Grading Information
To submit your completed Assignment for review and grading, do the following: CORE SKILL: appraisal is the disciplined act of asking whether a study’s CONCLUSION is actually supported by its METHODS — the ability to read a paper skeptically without reading it cynically.
THE THREE APPRAISAL QUESTIONS (the classic frame): (1) Are the results VALID? (internal validity — was the study designed and executed so that the finding is likely true for the people studied?) (2) What ARE the results? (effect size, precision) (3) Will they help ME care for MY patients? (external validity/applicability).
USE A NAMED TOOL — this is a graded element and freestyling costs marks: CASP checklists (design-specific), the Johns Hopkins Research Evidence Appraisal Tool, the Cochrane Risk of Bias 2 tool, AMSTAR-2 (for systematic reviews), or the Rapid Critical Appraisal checklists in Melnyk & Fineout-Overholt.
WHAT TO INTERROGATE IN A QUANTITATIVE STUDY:
— SAMPLING: probability vs. convenience? Was there a POWER ANALYSIS? An underpowered study that finds “no significant difference” has not shown equivalence — it has failed to look hard enough. ABSENCE OF EVIDENCE IS NOT EVIDENCE OF ABSENCE, and this is the single most misread result in the literature.
— RANDOMIZATION AND ALLOCATION CONCEALMENT (different things — randomization is the method; concealment prevents the recruiter from knowing the next assignment and subverting it).
— BLINDING: who was blinded — participants, clinicians, outcome assessors, analysts?
— ATTRITION: how many were lost, and were they DIFFERENT from those retained? Was INTENTION-TO-TREAT analysis used (which preserves randomization) or per-protocol (which can reintroduce bias)?
— CONFOUNDING: what was measured and adjusted for — and what wasn’t?
— THE STATISTICS: a p-value tells you the probability of the data given the null hypothesis; it does NOT tell you the size or importance of the effect. STATISTICAL SIGNIFICANCE IS NOT CLINICAL SIGNIFICANCE — with a large enough sample, a trivial difference becomes “significant.” Look at the EFFECT SIZE and the CONFIDENCE INTERVAL (a wide CI signals imprecision; if it crosses the null value, the result is compatible with no effect). Prefer ABSOLUTE risk reduction and NUMBER NEEDED TO TREAT over relative risk reduction, which is the standard way of making a small effect sound large.
BIASES TO NAME: selection, measurement/information, recall (case-control), attrition, performance, detection, publication bias, and the Hawthorne effect.
QUALITATIVE APPRAISAL uses different criteria — TRUSTWORTHINESS (credibility, transferability, dependability, confirmability) via member checking, audit trail, reflexivity, triangulation, thick description. Do not ask a phenomenological study for a power analysis.
FOR THE ASSIGNMENT: complete the appraisal tool for each article, then write a SUMMARY that states — for each study — the level of evidence, the key strengths, the key limitations, and whether it should inform practice. Then synthesize ACROSS studies: do they agree? If not, why (different populations, doses, outcome measures, designs)? The synthesis is what earns the top band; a series of study summaries stapled together does not.
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