| Course | GB890 Doctoral Project I: Problem Statement and Background Research |
|---|---|
| Unit | Unit 4 |
| Paper type | Closest study appraisal |
| Length | About 1,180 words, 7 pages double-spaced |
| Format | APA 7 student paper |
| School | Purdue University Global |
| Program | MBA |
| Updated | October 2026 |
Free sample paper for GB890 Unit 4
How Much Room Is Left? A Unit 4 Appraisal of Zohar's 2002 Supervisory Safety Intervention
[Student Name]
Purdue University Global
GB890: Doctoral Project I: Problem Statement and Background Research
Unit 4 Closest Study Appraisal
[Instructor Name]
[Date]
The Corliss comparison is composite and illustrative; the appraised study and the other sources cited are real, and the appraisal's judgments are the candidate's.
The Study in Plain Terms
Zohar (2002) worked with supervisors and their work groups in a manufacturing company. The study rested on a model in which supervisors' attention to safety, as their subordinates perceive it, shapes a group's safety climate, and climate in turn shapes behavior and injury, a model the same author had tested earlier by linking group climate to minor injuries (Zohar, 2000). The intervention had two parts. Supervisors in the experimental groups received repeated feedback, based on brief interviews with their own workers, about how often their everyday interactions with workers had concerned safety. They were also given a goal: to increase the share of safety-related interactions. Supervisors in the comparison groups received no feedback.
Three kinds of outcomes were measured. Minor injuries came from the plant's clinic records. Earplug use, a safety behavior required in the plant's noisy areas, was observed directly. And safety climate was measured with a survey of workers. In the experimental groups, the share of safety-related interactions rose, minor injury rates fell, earplug use increased and safety climate scores improved. The comparison groups showed no comparable change.
Why the Study Is Strong
The study has three features that make its result credible. The outcomes were measured in different ways, from clinic records, direct observation and surveys, so the result does not depend on one source. Injuries came from medical records rather than reports by the supervisors whose behavior was being changed. And the intervention was specific: it targeted one behavior, safety talk in daily interactions, which allows a clear statement of what was changed.
What the Study Could Not Control
A design appraisal must also name what the study left open. The experimental and comparison groups worked in the same plant, sharing space, managers and in some cases workers who moved between groups. That proximity could spread the intervention's effects to comparison groups, which would shrink the measured effect below the real one, or could make supervisors in comparison groups aware that they were not receiving attention, which could change their behavior in either direction. Assignment to conditions was not described as random at the level of individual groups, so groups that received the intervention might have differed in ways that affected the outcomes. The follow-up period was relatively short, so the persistence of the change is uncertain. And the feedback was delivered by researchers, which leaves open whether a company could sustain the procedure on its own.
Overlap With the Corliss Question
The Corliss project asks whether telling shift supervisors each week how often their crews heard safety from them shifts the crews' safety climate and their near-miss reporting. Set beside Zohar's study element by element, four elements have already been tested. The mechanism, supervisory safety communication shaping group climate, is the same. The intervention, feedback to supervisors based on workers' accounts of their interactions, is the same in form. The setting, manufacturing with machine hazards, is comparable. And one outcome, group safety climate, is the same.
That is substantial overlap. A study that simply repeated Zohar's design in a bakery would add little beyond showing that the result holds in another plant.
Four of the Corliss project's elements were tested twenty years ago, so its contribution must come from the three that were not.
What Remains Untested
Three differences remain, and they define what the Corliss project could add.
Crew churn. Zohar's work groups appear to have had stable membership. Corliss crews turn over rapidly: a substantial share of associates on any line at any time are within their first ninety days, many of them agency temporaries who may stay only weeks. Whether supervisory feedback can shift group climate when the group is constantly changing is an open question, and the Unit 2 evidence suggests it is the question that matters most at Corliss.
Agency employment. Temporary workers placed by staffing agencies have two employers. The host employer controls the work, and the agency employs the worker. Federal guidance has emphasized that both share responsibility for temporary workers' safety (Occupational Safety and Health Administration & National Institute for Occupational Safety and Health, 2014), but how a host's supervisors communicate with agency workers, who may not expect to stay, has received little research attention.
Who delivers the feedback. In Zohar's study, researchers collected workers' accounts and delivered feedback. At Corliss, the feedback would be produced by the company's own safety function, using a short weekly pulse question answered by crew members. Whether an internal, routine version of the procedure works as well as a researcher-led one is the practical question a company most needs answered.
Reading the Outcomes Carefully
The choice of outcomes deserves attention because the Corliss project will face the same choice. Zohar measured minor injuries, events treated at the plant clinic, rather than the more serious recordable injuries that appear in OSHA logs. Minor injuries are far more frequent, so changes can be detected within months in a modest number of groups. Recordable injuries are rare enough that a single plant might see only a few in a season, and a study using them as its main outcome would need many more groups or a much longer period to detect any change. Earplug use offered a second advantage: it could be observed directly and frequently, giving a behavioral measure that did not depend on injuries occurring at all.
Corliss has no plant clinic that records minor injuries consistently across its five plants. Its closest equivalents are first-aid logs, which vary in completeness, and near-miss reports, which the Unit 2 evidence showed are rare at the plants that most need them. That gap shapes the Corliss design: near-miss reporting becomes both a target of the intervention and an outcome, and group safety climate, measured by survey, becomes the primary outcome, as it was one of Zohar's.
Implications for the Corliss Design
Three design choices follow from this appraisal. The project should compare plants rather than groups within a plant, to avoid the spread between conditions that shared space allowed in Zohar's study. It should measure climate at the crew level and report how much crew membership changed during the study, since churn is the condition it adds. And it should document how the company's safety staff produce and deliver the feedback, so that the question of internal delivery can be answered.
Verdict
Zohar (2002) is a strong study whose central finding the Corliss project should accept rather than retest. The project's contribution lies in the three differences: high churn, agency employment and internal delivery. The project's purpose and research questions, developed in later units, should be written to address those differences directly and should state plainly that the basic mechanism has been tested before.
References
Occupational Safety and Health Administration & National Institute for Occupational Safety and Health. (2014). Recommended practices: Protecting temporary workers (DHHS [NIOSH] Publication No. 2014-139). U.S. Department of Labor.
Zohar, D. (2000). A group-level model of safety climate: Testing the effect of group climate on microaccidents in manufacturing jobs. Journal of Applied Psychology, 85(4), 587-596. https://doi.org/10.1037/0021-9010.85.4.587
Zohar, D. (2002). Modifying supervisory practices to improve subunit safety: A leadership-based intervention model. Journal of Applied Psychology, 87(1), 156-163. https://doi.org/10.1037/0021-9010.87.1.156
The Purdue Global GB890 Unit 4 instructions
Unit 4 of GB890 asks you to appraise the single study closest to your project. Restate the study in plain terms: who took part, what the intervention involved, what was measured and what was found. Explain what makes the result credible. Then name what the design could not control, and say how each gap could affect the result. Examine the outcomes the study used and what that choice implies for your own measures. Set the study beside your project element by element and state honestly how many elements it has already tested. Identify what remains untested, with evidence that each difference matters at your site. Draw the implications for your design. Close with a verdict on what your project should accept from the study and what it should contribute. Six pages in APA 7, with a design table and an overlap table, is a common format.
Inside the GB890 Unit 4 example
The appraisal restates Zohar's model and two-part intervention, feedback and goal setting, and the three outcomes from clinic records, observation and surveys. Strengths follow: multiple outcome sources, records not supervisor reports and a specific target behavior. Uncontrolled features include shared plant space, unclear random assignment, short follow-up and researcher-delivered feedback. A section explains why minor injuries suited the study and why Corliss must rely on climate and near-miss reporting instead. The overlap section concedes four tested elements, and the highlighted sentence states the consequence. Three open differences are explained, with federal guidance on temporary workers. Design implications favor plant-level comparison and documented internal delivery, and the verdict accepts the mechanism.
Where the points sit in the GB890 Unit 4 rubric
GB890 instructors grade the closest study appraisal on honesty about overlap. A plain restatement of the study, with outcomes and how they were measured, is expected first. Credit goes to strengths explained with reasons, followed by uncontrolled features and their likely effect on the result. Examining the study's outcome choices, and what they mean for the candidate's own measures, shows practical design thinking. The overlap comparison carries the most weight: candidates who concede what has already been tested score better than those who exaggerate originality. Each remaining difference should be supported by evidence from the candidate's site. Design implications and a clear verdict show the appraisal will shape the project. Citations must be accurate.
GB890 Unit 4 help from the desk
Many GB890 closest study appraisals summarize the study's abstract and move quickly to claiming that the project is different. Others list limitations without explaining how each would affect the result. Students often avoid admitting how much a prior study already tested, which a committee will notice. Outcome choices are rarely examined, though they determine what the project can measure. Remaining differences are asserted without evidence that they matter. Restate the study fully, explain its strengths, name what it left uncontrolled, examine its outcomes, compare element by element, concede the overlap, support each difference with local evidence, draw design implications and give a verdict. Share the study closest to your idea, and a writer can help you appraise it.
Get a GB890 Unit 4 example written to your instructions
Which published study sits nearest your own idea? Name it, or send the search results if nobody has picked yet, along with the Unit 4 rubric. The appraisal that comes back restates the study plainly, concedes what it already tested and argues only the differences that could matter. It arrives inside 24-48h, and a first sample carries no charge. The paper above is an original model document written by our desk, not a submitted student paper and not an official Purdue University Global document.
More GB890 papers and MBA samples
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GB890 Unit 4 questions, answered
What if the closest study already tested my idea?
Then the appraisal says so, and the project narrows to what remains open, which is exactly what this unit is for. Few studies close a question completely: a different workforce, setting, outcome or delivery method often leaves room. Conceding overlap early reads as competence to a committee, while discovering it at the proposal defense costs far more time.
Why restate the study instead of quoting its abstract?
Because an abstract compresses the design into a label, and a label hides the details that decide whether the study resembles yours. Writing out who received what, how often, and what was measured forces a precise reading. In GB890, instructors often judge the whole appraisal by whether that restatement would let someone else rebuild the intervention.
Should the appraisal criticize the study's limitations?
It should weigh them, which is different. Some limitations weaken a result and some, like contamination between groups sharing a site, make an observed effect more believable. Listing every limitation as a flaw reads as a checklist. The useful question for each one is whether it changes what the study can tell you about your own setting.
Where can I find a free GB890 Unit 4 sample paper?
A complete GB890 Unit 4 closest study appraisal is on this page, weighing Zohar's 2002 supervisory safety intervention against a bakery group's project and identifying what remains untested.
What did Zohar's 2002 intervention change?
Supervisors received feedback based on their workers' accounts of how often daily interactions concerned safety, with a goal to increase them. Minor injuries fell, earplug use rose and safety climate improved in their groups.