Evidence-Based Design Accreditation and Certification (EDAC) — Questions and Answers

Question 1: Which data collection method is classified as qualitative in EBD research?

Infection rate tracking
Patient fall counts
Focus group interviews (Correct answer)
Survey Likert scale scores

Correct answer: Focus group interviews

Focus group interviews capture subjective experiences and opinions, making them a qualitative method.

Question 2: Which material property rating should designers prioritize when selecting ceiling tiles to reduce noise levels within a healthcare space?

Impact Insulation Class (IIC)
Noise Reduction Coefficient (NRC) (Correct answer)
Ceiling Attenuation Class (CAC)
Sound Transmission Class (STC)

Correct answer: Noise Reduction Coefficient (NRC)

The Noise Reduction Coefficient (NRC) rates how much sound energy a surface absorbs; higher NRC ceiling tiles reduce reverberant noise levels within a room.

Question 3: What is the primary EBD rationale for decentralized nursing stations?

They improve physician communication by centralizing records
They lower construction costs by eliminating a central hub
They reduce noise in administrative areas
They reduce nurse walking distance and increase time at the bedside (Correct answer)

Correct answer: They reduce nurse walking distance and increase time at the bedside

Decentralized nursing stations place nurses closer to patient rooms, reducing travel time and increasing direct patient care time.

Question 4: During the design process, personnel participated in a visioning session to identify perceived problems and to develop design concepts. A literature review was conducted to see if credible evidence could be found to support the suggested improvements. The findings were discussed with the staff. What was the PRIMARY reason for doing this?

To discuss existing workflow.
To meet union requirements.
To encourage support and buy-in.
To make an informed decision. (Correct answer)

Correct answer: To make an informed decision.

The process of conducting visioning sessions, literature reviews, and staff discussions serves a primary purpose: to make informed decisions. By gathering input from personnel, reviewing credible evidence, and discussing findings, the project team ensures that design concepts are well-supported. This comprehensive approach leads to design choices that are based on both experiential knowledge and scientific research, resulting in better outcomes.

Question 5: EBD evidence on patient privacy most commonly links private rooms to which clinical improvement?

Improved radiology throughput
Faster surgical scheduling turnover
Lower emergency department wait times
Reduced healthcare-associated infection rates (Correct answer)

Correct answer: Reduced healthcare-associated infection rates

Private rooms prevent cross-contamination between patients and allow proper isolation procedures, directly reducing HAI rates.

Question 6: Why is it important for the project team members to investigate confounding variables before reporting results?

Findings may have been influences by other factors. (Correct answer)
Findings may falsely support or reject the initial hypothesis.
Findings may contradict previous research.
Findings may not be readily applicable to new design projects.

Correct answer: Findings may have been influences by other factors.

Confounding variables are extraneous factors that can influence both the independent and dependent variables in a study, potentially distorting the true relationship between them. It is crucial for project teams to investigate these variables before reporting results because their unacknowledged presence can lead to inaccurate conclusions. If not accounted for, confounding variables might falsely suggest a cause-and-effect relationship or obscure a real one, compromising the validity and reliability of the research findings.

Question 7: A project team wants to make sure that the results of a patient satisfaction tool they developed within a healthcare setting have a high degree of external validity. What does external validity mean?

The tool generates results that are statistically significant.
The tool results are generalizable to theoretical constructs.
The tool reliability measures what it is supposed to measure.
The tool may be successfully used within other healthcare settings. (Correct answer)

Correct answer: The tool may be successfully used within other healthcare settings.

External validity refers to the extent to which the results of a study or the utility of a tool can be generalized to other populations, settings, or times. If a patient satisfaction tool developed within one healthcare setting has a high degree of external validity, it means its findings and effectiveness are likely applicable and transferable to other similar healthcare settings, making it broadly useful.

Question 8: Which aspect of environmental psychology is most directly addressed by providing patients with control over room temperature?

Safety, by preventing hypothermia in post-operative patients
Privacy, which reduces embarrassment during examinations
Thermoregulation, which speeds metabolic recovery
Perceived control, which reduces psychological stress and improves coping (Correct answer)

Correct answer: Perceived control, which reduces psychological stress and improves coping

Perceived control over one's environment is a powerful psychological buffer against stress; even small controls like temperature adjustment reduce patient anxiety.

Question 9: In EBD, a 'benchmark' is best described as:

A physical marking on a construction site indicating elevation
A reference point from existing research or high-performing facilities against which design outcomes are compared (Correct answer)
A minimum code requirement for healthcare facility square footage
A standard specification for healthcare-grade building materials

Correct answer: A reference point from existing research or high-performing facilities against which design outcomes are compared

Benchmarks in EBD provide comparative targets — drawn from research or peer facilities — allowing teams to assess whether a design intervention achieved meaningful improvement.

Question 10: Historically, most healthcare organizations have thoughts of the physical buildings as a sunk costs. As a part of the evidence-based design process, and when developing the business case, what is they physical building viewed as?

a healing environment
a strategic investment (Correct answer)
a capital expense
A revenue center

Correct answer: a strategic investment

In the context of evidence-based design, physical buildings are increasingly viewed as strategic investments rather than mere sunk costs. This perspective highlights how thoughtful design can positively impact key organizational outcomes, such as patient safety, staff well-being, and operational efficiency. By linking design to measurable results, the building becomes a tool for achieving strategic goals and generating value.

Question 11: There is an opportunity for transformational change during a new design and construction project. Who or what group is in the BEST position to drive the change in culture necessary to achieve the vision for the new facility?

Board of Directors (Correct answer)
Chief Operating Officer
Chief Executive Officer
Physicians and Nurses

Correct answer: Board of Directors

For transformational change within an organization, particularly in a new design and construction project, leadership from the highest level is paramount. The Board of Directors is in the best position to drive the necessary cultural shift and champion the vision for the new facility. Their strategic oversight and commitment ensure that evidence-based design principles are fully integrated and supported throughout the organization.

Question 12: Which design feature has the strongest EBD evidence for directly reducing patient falls?

Bed alarm systems integrated into the call light
Handrails on both sides of all patient corridors
Single-patient rooms with bathrooms located close to the bed (Correct answer)
Slip-resistant flooring throughout all clinical areas

Correct answer: Single-patient rooms with bathrooms located close to the bed

Rooms with adjacent bathrooms reduce the distance patients must travel unsupported, which is the leading situational factor in patient falls.

Question 13: Which element of healthcare facility design is most directly associated with reducing medication errors according to EBD research?

Medication carts stored in main corridors for accessibility
Open-plan nursing stations for peer oversight
Overhead paging systems to alert nurses of medication times
Dedicated, quiet medication preparation rooms free from interruptions (Correct answer)

Correct answer: Dedicated, quiet medication preparation rooms free from interruptions

Dedicated, distraction-free medication rooms significantly reduce interruptions during drug preparation, which are a leading cause of medication errors.

Question 14: An EDAC candidate reviewing a research article should first assess which characteristic?

The study design and its position in the hierarchy of evidence (Correct answer)
The number of citations the article has received
Whether the study was conducted in the United States
The affiliation and reputation of the journal publisher

Correct answer: The study design and its position in the hierarchy of evidence

Study design determines the strength and type of evidence provided; candidates must assess this first to know how much weight to assign the findings.

Question 15: Which EBD-supported design intervention has the strongest evidence for improving patient sleep in hospitals?

Continuous background music to mask disruptive sounds
Restricting all staff communication to written notes after 10 PM
Blacked-out window coverings to eliminate all light
Sound-absorbing materials combined with nighttime quiet protocols (Correct answer)

Correct answer: Sound-absorbing materials combined with nighttime quiet protocols

Combining acoustic environmental design with behavioral quiet-at-night protocols produces the strongest evidence-based improvement in hospital sleep.

Question 16: In evidence-based design, 'wayfinding' primarily addresses:

Regulatory evacuation routes required by fire codes
The structural pathways for utility systems within walls
How patients, visitors, and staff navigate through a healthcare facility (Correct answer)
The flow of medical supplies from loading dock to units

Correct answer: How patients, visitors, and staff navigate through a healthcare facility

Wayfinding encompasses all environmental cues — signage, landmarks, layout — that help people orient and navigate a healthcare facility.

Question 17: A researcher calculates a p-value of 0.03 for a design intervention study. This means:

The design intervention improved outcomes by 3%
The study has a 3% error rate in data collection
Only 3% of participants benefited from the intervention
There is a 3% probability that the result occurred by chance alone (Correct answer)

Correct answer: There is a 3% probability that the result occurred by chance alone

A p-value of 0.03 indicates only a 3% probability that the observed result occurred by random chance, suggesting statistical significance.

Question 18: As soon as the project scope is defined, which of the following should kick-off the research process?

Conduct a literature review
Establish performance metrics
Document a hypothesis
Identify research questions (Correct answer)

Correct answer: Identify research questions

As soon as the project scope is clearly defined, the research process in evidence-based design should commence by identifying specific research questions. These questions serve as the foundation for the entire inquiry, guiding the literature review, data collection, and analysis. They articulate precisely what the project team needs to learn to make informed, evidence-based design decisions.

Question 19: Which environmental psychology principle explains why music in healthcare waiting areas can reduce perceived wait times?

Rhythm synchronizes cortisol cycles to a therapeutic tempo
Positive distraction fills attentional capacity, making time feel shorter (Correct answer)
Music signals high-quality care, setting positive expectations
Music masks conversation noise, reducing overheard stressful content

Correct answer: Positive distraction fills attentional capacity, making time feel shorter

Positive distractions — music, art, nature views — occupy attention and reduce the subjective experience of wait duration.

Question 20: Which of the following is a primary goal of 'healing environment' design in EBD?

Minimizing window area to reduce HVAC loads
Standardizing all room layouts to reduce construction variability
Reducing patient stress by incorporating nature, light, and social support spaces (Correct answer)
Maximizing the number of patient beds per square foot

Correct answer: Reducing patient stress by incorporating nature, light, and social support spaces

Healing environments are designed to reduce psychosocial stressors and support recovery through biophilic, social, and restorative design elements.

Question 21: A meta-analysis in EBD research is most useful because it:

Offers expert consensus without raw data
Provides a detailed narrative of a single case
Combines statistical results from multiple studies to increase power and precision (Correct answer)
Replaces the need for primary research in practice

Correct answer: Combines statistical results from multiple studies to increase power and precision

Meta-analyses pool quantitative data from many studies, yielding more reliable estimates of an intervention's effect.

Question 22: In the context of healthcare acoustic design, 'speech privacy' refers primarily to which of the following?

Acoustic clarity of overhead public address systems
Prevention of patient conversations from being understood by unintended listeners (Correct answer)
Background noise levels in public waiting areas
The clarity of staff-to-staff communication over intercoms

Correct answer: Prevention of patient conversations from being understood by unintended listeners

Speech privacy ensures that confidential patient conversations cannot be understood outside the intended space, supporting HIPAA compliance and patient dignity.

Question 23: According to EBD research, which design element most effectively reduces nurse medication errors?

Overhead display screens showing medication schedules
Medication scanning stations located in patient corridors
Larger medication carts with color-coded drawers
Dedicated, enclosed medication preparation rooms that minimize interruptions (Correct answer)

Correct answer: Dedicated, enclosed medication preparation rooms that minimize interruptions

Interruption during medication preparation is a leading cause of errors; dedicated rooms physically shield nurses from interruptions.

Question 24: In EBD, 'translational research' refers to:

Moving research data from paper records to digital systems
Converting qualitative findings into quantitative metrics
Translating studies from foreign languages for US practice
Applying laboratory or academic research findings to real-world design practice (Correct answer)

Correct answer: Applying laboratory or academic research findings to real-world design practice

Translational research bridges the gap between scientific findings and their practical application in design decisions.

Question 25: What is the core principle of 'biophilic design' as applied in evidence-based healthcare environments?

Creating living walls for air filtration in clinical corridors
Incorporating nature — light, plants, water, natural materials — to reduce human stress and support healing (Correct answer)
Designing facilities that use only biodegradable building materials
Using biological research labs as the basis for clinical floor plans

Correct answer: Incorporating nature — light, plants, water, natural materials — to reduce human stress and support healing

Biophilic design is grounded in humans' innate affinity for nature, and research shows nature elements in care environments reduce stress hormones and pain.

Question 26: During the design development phase, the project team developed a number of proposed evidence-based design features. In support of their desire to conduct post-occupancy research, what MUST the team include in the hypotheses to properly evaluate their design features?

Primary research focus
Baseline metrics
Intended outcomes (Correct answer)
Related references

Correct answer: Intended outcomes

To properly evaluate evidence-based design features through post-occupancy research, hypotheses must clearly state the intended outcomes. A hypothesis serves as a testable prediction about the expected results of the design intervention, linking specific design features to measurable improvements. Without clearly defined intended outcomes, it becomes impossible to objectively assess whether the design achieved its goals, making the post-occupancy evaluation ineffective and unable to provide actionable insights.

Question 27: Which of the following best defines 'evidence-based design' (EBD) in the context of the EDAC credential?

The process of making design decisions based on the best available research from credible studies (Correct answer)
Following design guidelines issued by accreditation agencies
Using computer-aided design software to model evidence-based construction materials
Designing buildings in compliance with all current building codes and standards

Correct answer: The process of making design decisions based on the best available research from credible studies

EBD is a structured process of grounding design decisions in the best available credible research to achieve measurable outcomes.

Question 28: When measuring or evaluating results, various methodologies can be used. Independently they may have limitations Which of the following described the use of multiple methods to strengthen the validity and reliability of the research project?

Applied research
Qualitative research
Correlation
Triangulation (Correct answer)

Correct answer: Triangulation

Triangulation is a research technique that involves using multiple methods, data sources, or theories to investigate the same phenomenon. This approach is vital because independent methodologies often have inherent limitations or biases. By combining different perspectives, triangulation strengthens the validity and reliability of research findings, providing a more comprehensive and robust understanding of the subject matter than any single method could achieve alone.

Question 29: In evidence-based design, a 'hypothesis' is best described as:

A definitive conclusion drawn from completed research
A qualitative description of patient experience
A testable prediction about the relationship between a design element and an outcome (Correct answer)
A regulatory standard for healthcare facility design

Correct answer: A testable prediction about the relationship between a design element and an outcome

A hypothesis is a specific, testable prediction that guides how a design intervention will affect measurable outcomes.

Question 30: Which flooring material is most commonly recommended in evidence-based healthcare design for balancing acoustic performance with infection control requirements?

Luxury vinyl tile (LVT) for impact noise reduction and cleanability (Correct answer)
Ceramic tile for moisture resistance and longevity
Polished concrete for durability and easy maintenance
Carpet for maximum sound absorption throughout the unit

Correct answer: Luxury vinyl tile (LVT) for impact noise reduction and cleanability

Luxury vinyl tile provides meaningful impact sound reduction, supports rigorous infection control cleaning protocols, and offers durability, making it the preferred acoustic-compliant flooring for healthcare.

Question 31: Which sampling method ensures every member of the population has an equal chance of selection?

Simple random sampling (Correct answer)
Purposive sampling
Convenience sampling
Snowball sampling

Correct answer: Simple random sampling

Simple random sampling gives every individual an equal probability of inclusion, reducing selection bias.

Question 32: What is 'environmental stressor theory' as it relates to healthcare facility design?

The concept that physical features like noise, crowding, and poor lighting compound patient physiological stress (Correct answer)
A model that categorizes hazardous materials found in healthcare environments
A theory about how cleaning chemicals affect indoor air quality
OSHA standards for workplace ergonomics in clinical settings

Correct answer: The concept that physical features like noise, crowding, and poor lighting compound patient physiological stress

Environmental stressor theory holds that negative physical environmental features activate the body's stress response, worsening health outcomes.

Evidence-Based Design Accreditation and Certification (EDAC)

The EDAC certification validates knowledge of evidence-based design principles for healthcare facilities, covering research methods, design processes, and the impact of built environments on patient outcomes and safety.

Questions

35 min

Time Limit

70%

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