HW410 Unit 5 Intervention Rationale Example

Twenty Minutes Under the Trees Between Shifts: A Unit 5 Intervention Rationale for an Emergency Dispatcher's Lunchtime Nature Walk

[Student Name]

Purdue University Global

HW410: The Science of Stress and Resilience

Unit 5 Intervention Rationale

[Instructor Name]

[Date]

The dispatcher, the center and the park are composite; the restoration theories and nature exposure studies cited are real.

The Dispatcher's Pattern

Kayla, a composite 26-year-old emergency communications dispatcher, works twelve-hour shifts at a county communications center with no windows. Calls arrive back to back during busy periods: car crashes, chest pain, domestic disputes, a child not breathing. Between calls she has seconds to minutes. She takes a forty-five-minute meal break mid-shift, which she spends at her console scrolling her phone or in a windowless break room with a television. She says that by the end of a shift she feels "wired and empty at the same time" and that she cannot stop replaying the worst calls on the drive home.

The Mechanism Targeted

The target is not the stress of each call, which is inherent in the job, but the absence of any recovery during the shift. Her stress response is activated repeatedly, and nothing in her workday gives it a chance to settle. The meal break is the one protected period long enough for recovery, and at present it is spent in an environment that does little to restore her.

Two theories explain why natural settings might help. Stress reduction theory proposes that viewing natural scenes produces a rapid, partly automatic reduction in physiological arousal and negative feeling; in an early experiment, people who watched a stressful film recovered faster on measures such as heart rate and muscle tension when they then watched videos of natural settings rather than urban ones (Ulrich et al., 1991). Attention restoration theory proposes that natural settings engage attention effortlessly, allowing the directed attention used for demanding tasks to recover (Kaplan, 1995). Dispatching depends heavily on directed attention: tracking several incidents, following protocols and listening for details under pressure.

The Intervention, Exactly

Kayla will spend twenty minutes of her meal break in Halsey Park, a small wooded park about four minutes' walk from the center, on at least three shifts a week. The protocol is specific:

1. Leave the phone in her locker or on silent in a pocket.

2. Walk or sit in the park for twenty minutes; the pace does not matter.

3. Attend to the setting, the trees, birds, sky and sounds, rather than to work.

4. Return with at least ten minutes of the break left to eat.

The duration comes from a study of urban residents who took a "nature pill" of their own choosing several times a week and gave saliva samples before and after. The greatest reduction in cortisol per minute occurred with experiences of twenty to thirty minutes, with diminishing returns beyond that (Hunter et al., 2019).

Linking Method to Mechanism

Each element of the protocol is tied to the mechanism. Leaving the phone removes the most likely source of continued work-related attention and preserves the effortless attention that restoration theory describes. Attending to the setting is what the theories propose as the active ingredient. The twenty-minute duration matches the evidence on dose. Leaving time to eat avoids trading one need for another.

A meta-analysis of studies on greenspace exposure linked more time in green settings with lower cortisol in saliva, slower resting heart rates and lower diastolic pressure, among other benefits (Twohig-Bennett & Jones, 2018). Most of these studies were observational and measured long-term exposure, so they cannot show that a single walk changes anything. The more direct evidence, from experiments and the daily-life cortisol study, supports short-term effects on arousal and stress hormones.

The walk is proposed not because nature is pleasant but because the meal break is the only protected window in Kayla's shift, and the evidence suggests twenty minutes in a green setting is enough to let both her arousal and her depleted attention begin to recover.

Fitting the Walk Into the Shift

Dispatch centers often cannot release a worker for a full break during surges, so the plan needs flexibility. Kayla will schedule the walk early in her break and take it whenever staffing allows; on nights when the center is overwhelmed, a five-minute stand at the building's back door, looking at the tree line, is the fallback. The center's supervisor has agreed to the plan in principle, since breaks are already protected by policy. On rainy days, a covered bench at the park's edge allows the same exposure with less walking. The goal is to make the walk the default use of the break, not an extra demand.

Why Not Something Else

Several alternatives were considered. A breathing technique could be used at the console between calls, but it would not provide the change of setting or the break in directed attention. Exercise at the gym would add physical demand to a body already depleted by a twelve-hour shift. Talking with coworkers in the break room can help but often turns to the calls themselves. The walk could later be combined with any of these. Its advantage is that it uses time Kayla already has, in a place a few minutes away, and asks nothing of her except that she go outside.

What It Cannot Touch

The walk will not change the content of the calls, the length of the shifts or the staffing that makes calls arrive back to back. It cannot address the replaying of traumatic calls, which may reflect more than ordinary stress; if Kayla continues to have intrusive memories, trouble sleeping or dread before shifts, she should be referred to the center's employee assistance program or a mental health professional. Night shifts and winter darkness will also limit the walk for part of the year, and the plan would need an indoor alternative, such as a window with a view or a room with plants and nature images.

What the Supervisor Gains

The intervention also has a case at the level of the center. Dispatch centers struggle to retain staff, and burnout is a common reason dispatchers leave. A walk that costs nothing, uses an existing break and may reduce end-of-shift exhaustion is an easy thing for a supervisor to support. If it helps Kayla, it could be offered to others without changing staffing or schedules.

How Success Would Be Judged

For four weeks, Kayla will score how wired she feels from zero to ten before and after every walk and again when each shift ends. Lower post-walk ratings and lower end-of-shift ratings on walk days than on non-walk days would suggest the intervention is helping.

References

Hunter, M. R., Gillespie, B. W., & Chen, S. Y.-P. (2019). Urban nature experiences reduce stress in the context of daily life based on salivary biomarkers. Frontiers in Psychology, 10, Article 722. https://doi.org/10.3389/fpsyg.2019.00722

Kaplan, S. (1995). The restorative benefits of nature: Toward an integrative framework. Journal of Environmental Psychology, 15(3), 169-182. https://doi.org/10.1016/0272-4944(95)90001-2

Twohig-Bennett, C., & Jones, A. (2018). The health benefits of the great outdoors: A systematic review and meta-analysis of greenspace exposure and health outcomes. Environmental Research, 166, 628-637. https://doi.org/10.1016/j.envres.2018.06.030

Ulrich, R. S., Simons, R. F., Losito, B. D., Fiorito, E., Miles, M. A., & Zelson, M. (1991). Stress recovery during exposure to natural and urban environments. Journal of Environmental Psychology, 11(3), 201-230. https://doi.org/10.1016/S0272-4944(05)80184-7