In November 2024, we published two essays on LinkedIn under the title The Stress Equation: How Tech Job Demands Shape Employee Behavior. The argument was relatively straightforward. Employees in technology environments face a combination of challenge and hindrance stressors. Those demands consume psychological resources. As those resources become depleted, behavior changes. Employees become more fatigued, less resilient, less willing to speak up, and more likely to retreat toward safer, less cognitively demanding responses.
At the time, the model was compelling because it connected several phenomena that organizations usually examine separately. Workload was not merely a wellbeing issue. Role ambiguity was not merely a job-design problem. Employee silence was not merely a cultural outcome. They could potentially be understood as different parts of the same behavioral process.
Two years later, the question still matters.
But the explanation needs to become more precise.
The deeper we look at the evidence, the harder it becomes to defend a simple equation in which job demands drain a finite psychological resource and behavior deteriorates as that resource is consumed. The more interesting story is also a more complicated one. Demands do not act on employees in isolation. Their effects depend on how they are interpreted, what other demands surround them, what resources are available, whether recovery is possible, and whether the social environment makes particular behaviors worth the effort or risk.
The original question was therefore probably right.
The mechanism was too simple.
The Problem With Treating Stressors as Fixed Categories
The distinction between challenge and hindrance stressors remains useful. Cavanaugh and colleagues originally proposed that some demands, such as responsibility, workload, and time pressure, can contain opportunities for achievement and growth, while others, such as role ambiguity, organizational politics, and unnecessary bureaucracy, are more likely to obstruct goal attainment. Subsequent meta-analytic work supported an important part of that distinction: hindrance stressors tend to relate negatively to performance, while challenge stressors can combine strain with motivational benefits (LePine, Podsakoff, & LePine, 2005).
But a category is not an experience.
Research that explicitly examined appraisal showed that the same demand can be perceived simultaneously as challenging and hindering, rather than belonging permanently to one category or the other. Webster, Beehr, and Love found that workload, role conflict, role ambiguity, and responsibility could produce different appraisals across employees, with appraisal itself helping explain outcomes. Later work has reinforced this point: even demands traditionally labeled as “challenges” can be experienced as hindrances or threats depending on the surrounding context.
This changes the interpretation considerably.
A tight deadline is not inherently developmental.
For one employee, it may signal trust, importance, and an opportunity to demonstrate competence. For another, the same deadline may arrive on top of contradictory priorities, insufficient staffing, unclear authority, and several unfinished projects. The nominal demand is identical. The organizational reality is not.
The distinction therefore becomes less interesting when framed as What kind of stressor is this? and more interesting when framed as Under what conditions does this demand become a challenge, a hindrance, or a threat?
That is a much more organizational question.
Ego Depletion Was an Elegant Answer to a Messier Problem
The concept of ego depletion provided an intuitively appealing mechanism for our original argument.
Baumeister and colleagues proposed that acts of self-control draw upon a limited resource, making subsequent self-regulation more difficult. The metaphor was powerful because it resembled ordinary experience. After a day of suppressing frustration, navigating difficult clients, switching repeatedly between tasks, managing conflict, and maintaining professional composure, people often do feel cognitively and emotionally spent.
It was easy to move from that experience to a resource-depletion explanation.
The empirical history of ego depletion, however, became considerably more complicated.
Reanalysis and meta-analytic work raised concerns that the original literature may have substantially overestimated the effect, with evidence of publication bias and weaker effects under stricter testing conditions. Carter and colleagues found little support for the idea that self-control depends on a limited resource in the way the classic model proposed.
Large preregistered replication efforts complicated the picture further. One multilab replication involving 12 laboratories and 1,775 participants found a small effect, while a later 36-site preregistered project involving 3,531 participants produced a nonsignificant confirmatory effect and Bayesian evidence that favored the null over the prespecified depletion hypothesis.
That does not mean fatigue is imaginary.
It means that fatigue should not automatically be interpreted as evidence that a finite self-control resource has literally been depleted.
That distinction matters.
The workplace phenomena described in our original essays - exhaustion, withdrawal, reduced voice, difficulty sustaining attention, preference for easier responses - remain observable and theoretically important. But we no longer need to place them all inside one contested mechanism.
Perhaps the more productive question is not whether employees have “run out” of self-control.
Perhaps it is what sustained demands do to attention, motivation, affect, recovery, and the perceived value of continued effort.
From Depletion to Demand–Resource Dynamics
This is where Job Demands–Resources theory offers a broader lens.
The central idea is not that every difficult demand is harmful or that every employee possesses a fixed reservoir that gradually empties. Rather, work produces an ongoing interaction between demands that require sustained effort and resources that help people meet those demands, learn from them, recover from them, or interpret them differently.
Recent reviews of JD-R theory emphasize precisely this interaction, including person-by-situation effects, multilevel dynamics, proactive behavior, and the relationship between work and non-work resources.
This reframes the stress equation.
High workload may be sustainable when autonomy is high, priorities are coherent, support is available, recovery is possible, and employees perceive the effort as meaningful.
The same workload may become destructive when coupled with role ambiguity, low control, constant interruption, interpersonal conflict, or the expectation of permanent availability.
In fact, research increasingly suggests that supposedly positive “challenge” demands are not universally positive. Their effects depend on appraisal and on what other demands occur around them. A 2022 daily-diary study, for example, found that when hindrance demands were high, employees were less likely to interpret time pressure and complexity as challenges and more likely to experience them as hindrances or threats.
This is important because organizations often treat workload almost morally.
Some pressure is assumed to be good because it “pushes people.”
But pressure has no independent organizational meaning.
Its meaning emerges from the system around it.
Recovery Is Not the Absence of Work
One element from the original essays has aged particularly well: recovery.
Research on psychological detachment has repeatedly shown that leaving the workplace physically is not equivalent to leaving work psychologically. Employees may stop working at six while continuing to replay conversations, anticipate unresolved problems, respond mentally to tomorrow's demands, or remain available through digital channels.
Sonnentag, Kuttler, and Fritz found that workload and other stressors were associated with poorer psychological detachment, which in turn predicted emotional exhaustion and greater need for recovery. Later reviews have continued to treat recovery during non-work time as an important component of employee health and functioning.
More recent meta-analytic evidence also suggests that interventions can improve psychological detachment, although effect sizes are modest and the form and duration of intervention matter.
This suggests another shift in perspective.
Recovery should not be framed primarily as an individual responsibility.
Organizations frequently tell employees to disconnect while simultaneously maintaining conditions that make disconnection difficult. Ambiguous responsibilities remain unresolved. Messages continue after hours. Dependencies make people indispensable. Work is organized through constant interruption. Social expectations reward rapid availability.
Then the employee is advised to develop better boundaries.
The contradiction is obvious.
A recovery problem may be partially an individual behavioral problem.
It may also be a system design problem that follows the employee home.
Voice Is More Than a Function of Available Energy
Our original texts also linked stress to employee voice. That connection remains interesting, but it deserves a more relational explanation than simple depletion.
Employee voice is not merely the production of an opinion. It is a discretionary social act. Speaking up requires an employee to judge that there is something worth saying, someone worth saying it to, and a reasonable possibility that the act will produce value rather than unnecessary interpersonal cost.
Morrison's 2023 review of the voice and silence literature makes clear how broad this decision process has become in organizational research. Voice is shaped by individual motives, perceived risk, leadership behavior, organizational context, relationships, and expectations about whether speaking will matter.
Stress may influence that calculation.
But not necessarily because a mental fuel tank is empty.
An employee facing chronic role ambiguity may stop speaking because the system repeatedly demonstrates that ownership is unclear. An employee working under continuous time pressure may remain silent because raising an issue creates more work with uncertain payoff. Someone who has repeatedly offered ideas without acknowledgment may learn that voice is socially expensive and organizationally irrelevant.
From the outside, all three employees may appear “disengaged.”
Internally, each behavior may be entirely rational.
This is where the stress argument begins to intersect with the broader idea behind Unwritten Systems.
Behavior is often attributed to people when it is partly produced by the environment in which action occurs.
The Employee Is Not the Unit of Analysis
Perhaps this is the largest change in how we would frame the original essays today.
In 2024, we largely described stress as something that happens to an employee.
The organization creates demands. The employee experiences those demands. Psychological consequences follow.
That formulation is not wrong.
But it is incomplete.
Demands themselves are often relational and structural.
One employee's workload may exist because another role has not been filled. One person's constant interruption may result from occupying a brokerage position through which information must flow. Another employee may experience role ambiguity because decision authority is distributed inconsistently across formal and informal structures. A manager may be overwhelmed not because the job is inherently demanding, but because unresolved decisions continuously migrate upward.
What looks like individual stress may therefore be a visible manifestation of an organizational pattern.
This is where People Analytics can become more interesting than simply predicting burnout scores.
Instead of asking only who is stressed, we could ask where demands concentrate, which roles absorb disproportionate coordination load, where responsibility is repeatedly ambiguous, which network positions create constant interruption, and whether certain employees become permanent buffers for structural dysfunction.
That changes both the diagnosis and the intervention.
The employee stops being the problem to be repaired.
The system becomes something to be examined.
The Stress Equation Was Never Really an Equation
Looking back, the title itself now seems revealing.
The Stress Equation implied a degree of stability that organizational life rarely provides.
Demand A produces psychological state B, which produces behavior C.
Real organizations are not that linear.
The same demand can motivate one employee and exhaust another. The same employee may experience the same demand differently on two different days. A demanding project can be stimulating when resources and trust are high, then become intolerable when bureaucracy, ambiguity, and conflict accumulate around it.
Modern research increasingly supports this more contextual view. Meta-analytic work continues to show meaningful differences between challenge and hindrance demands, but appraisal research demonstrates that those categories are not psychologically fixed. JD-R theory places demands inside broader resource systems. Recovery research shows that strain extends beyond working hours. Voice research shows that speaking is socially and organizationally conditioned rather than simply generated by individual disposition.
What disappears is the simple equation.
What remains is the organizational question.
What conditions make demanding work sustainable, developmental, and worth engaging with - and what conditions transform the same demands into withdrawal, exhaustion, and silence?
That is a harder question.
It is also a more useful one.
What We Would Say Differently Today
The two essays published in November 2024 were written around the idea that workplace stressors could shape behavior partly through ego depletion.
Today, we would formulate the claim more carefully.
We would still distinguish demands that obstruct employees from those that can support growth, but we would pay far more attention to appraisal. We would still argue that persistent demands can alter behavior, but we would resist treating a finite self-control resource as the default explanation. We would still take fatigue seriously, but we would connect it to recovery, attention, affect, control, and work design rather than collapsing those mechanisms into one construct.
Most importantly, we would move the analysis away from the employee.
Because the more interesting question was never whether people are resilient enough to tolerate demanding work.
It is whether the organization has designed conditions in which demanding work can remain meaningful without becoming chronically destructive.
That distinction changes everything.
It changes what we measure.
It changes what we intervene on.
And it changes who we implicitly hold responsible when people begin to withdraw.
Perhaps the most important lesson from revisiting old work is not that a previous argument was right or wrong.
It is that evidence should be allowed to alter the argument.
If it does not, research has become decoration.
And if People Analytics is genuinely evidence-based, then one of its obligations is not merely to update its dashboards.
It must occasionally update its beliefs.
References
Bakker, A. B., Demerouti, E., & Sanz-Vergel, A. (2023). Job Demands–Resources Theory: Ten Years Later. Annual Review of Organizational Psychology and Organizational Behavior, 10, 25–53.
Baumeister, R. F., Bratslavsky, E., Muraven, M., & Tice, D. M. (1998). Ego depletion: Is the active self a limited resource? Journal of Personality and Social Psychology, 74(5), 1252–1265.
Carter, E. C., Kofler, L. M., Forster, D. E., & McCullough, M. E. (2015). A series of meta-analytic tests of the depletion effect: Self-control does not seem to rely on a limited resource. Journal of Experimental Psychology: General, 144(4), 796–815.
Crawford, E. R., LePine, J. A., & Rich, B. L. (2010). Linking job demands and resources to employee engagement and burnout: A theoretical extension and meta-analytic test. Journal of Applied Psychology, 95(5), 834–848.
Hagger, M. S., et al. (2016). A multilab preregistered replication of the ego-depletion effect. Perspectives on Psychological Science, 11(4), 546–573.
Karabinski, T., Haun, V. C., Nübold, A., Wendsche, J., & Wegge, J. (2021). Interventions for improving psychological detachment from work: A meta-analysis. Journal of Occupational Health Psychology, 26(3), 224–242.
LePine, J. A., Podsakoff, N. P., & LePine, M. A. (2005). A meta-analytic test of the challenge stressor–hindrance stressor framework. Academy of Management Journal, 48(5), 764–775.
Morrison, E. W. (2023). Employee voice and silence: Taking stock a decade later. Annual Review of Organizational Psychology and Organizational Behavior, 10, 79–107.
Schilbach, M., Arnold, M., Baethge, A., & Rigotti, T. (2023). Hindrance demands as a boundary condition to the appraisal of challenge demands. Anxiety, Stress, & Coping, 36(4), 443–462.
Sonnentag, S., Kuttler, I., & Fritz, C. (2010). Job stressors, emotional exhaustion, and need for recovery: A multi-source study on the benefits of psychological detachment. Journal of Vocational Behavior, 76(3), 355–365.
Sonnentag, S., Venz, L., & Casper, A. (2017). Advances in recovery research: What have we learned? What should be done next? Journal of Occupational Health Psychology, 22(3), 365–380.
Vohs, K. D., et al. (2021). A multisite preregistered paradigmatic test of the ego-depletion effect. Psychological Science, 32(10), 1566–1581.
Webster, J. R., Beehr, T. A., & Love, K. (2011). Extending the challenge-hindrance model of occupational stress: The role of appraisal. Journal of Vocational Behavior, 79(2), 505–516.