The year is 1939, and the world teeters on the brink of war. Yet, within the hallowed halls of academia, a different kind of darkness was brewing, a chilling experiment that would forever stain the annals of psychological research. This was the setting for “The Monster Study,” a true story of unethical research that aimed to understand stuttering, but instead inflicted lasting psychological harm on its young participants. The study, conducted by Wendell Johnson and his graduate student Mary Tudor at the University of Iowa, remains a stark reminder of the ethical boundaries that researchers must never cross, even in the pursuit of knowledge.
The prevailing understanding of stuttering in the early 20th century was largely rooted in the belief that it was a learned behavior, a product of social conditioning or psychological trauma. Wendell Johnson, a prominent speech pathologist who himself stuttered, was deeply invested in finding a cure. His work was driven by a personal desire to understand and alleviate the affliction that had impacted his own life.
Johnson’s “Diagnosogenic Theory”
At the heart of Johnson’s research was his “diagnosogenic theory” of stuttering. This theory posited that stuttering was not an inherent neurological or physiological condition, but rather a social disorder. Johnson believed that children who did not stutter initially would begin to do so if they were labeled as stutterers by others, particularly their parents or speech therapists. In essence, he theorized that the fear of stuttering was the true cause of stuttering itself.
The Quest for a Cure
Johnson’s ambition was to prove his theory and, in doing so, pave the way for a more effective approach to treating stuttering. He envisioned a method that would involve early intervention, preemptively addressing the perceived problem before it could take root. This noble goal, however, would lead him down a path of profound ethical transgression.
The Role of Mary Tudor
Mary Tudor, a graduate student under Johnson’s supervision, was tasked with conducting the practical aspect of this groundbreaking research. Her role was to implement Johnson’s theory in a controlled experiment, a task that would ultimately place her at the center of a scandal that would echo for decades. The weight of Johnson’s theoretical framework fell upon her shoulders as she prepared to execute a study that, in hindsight, was deeply flawed from its inception.
The true story of the Monster Study, a controversial speech experiment conducted on orphaned children in the 1930s, raises significant ethical questions about psychological research. For those interested in exploring this topic further, you can read a related article that delves into the implications of the study and its impact on the field of psychology. Check it out here: Unplugged Psych: The Monster Study.
The Unveiling of the Experiment: The Monster Study
The experiment, which later became known as “The Monster Study,” involved a group of orphaned children from an Iowa orphanage. These children, many of whom had no history of stuttering, were subjected to a series of speech therapy sessions designed not to help them, but to make them believe they were stutterers. The ethical breaches were numerous and glaring, even by the standards of the time.
Selecting the Participants
The selection of participants was one of the first ethical red flags. The study targeted children from an orphanage, a vulnerable population, often without explicit parental consent (as many had none). This raised immediate questions about the exploitation of individuals who lacked the agency to refuse participation or fully understand the potential consequences. The inherent power imbalance between the researchers and these young, impressionable children was undeniable.
The “Normal” Children
The study involved two groups of children. The control group consisted of children who were already diagnosed with stuttering. The experimental group, however, was comprised of 22 children who exhibited normal speech patterns and had no prior indication of stuttering. It was this group that would bear the brunt of the experiment’s misguided intentions.
The “Therapeutic” Sessions
The “therapy” sessions were, in reality, a systematic attempt to instill self-consciousness and anxiety about speech. Tudor, under Johnson’s guidance, would interact with the children, subtly (and sometimes not so subtly) pointing out perceived disfluencies in their speech. She would interrupt them, labeling their normal hesitations or repetitions as signs of stuttering.
Whispers of Doubt
Tudor, armed with a script and a specific objective, would employ a variety of tactics. She might pause during a child’s speech and say things like, “You are having trouble speaking,” or “You are stuttering.” Even the slightest hesitation or repetition, which is normal in child speech development, was magnified and presented as a pathological symptom.
The Seed of Fear
The intention was to create a self-fulfilling prophecy. By constantly drawing attention to their speech and labeling it negatively, Johnson and Tudor aimed to make the children anxious about speaking, thereby causing them to develop actual stuttering. The children, trusting the adults around them, began to internalize these criticisms, leading to a heightened awareness of their own speech.
The Devastating Ramifications: Long-Term Psychological Harm

The consequences of “The Monster Study” were not confined to the duration of the experiment. The psychological damage inflicted upon the children was profound and, in many cases, permanent. The study proved to be not a cure, but a cause of the very affliction it sought to understand.
The Emergence of Stuttering
For many of the children in the experimental group, the study had the intended, albeit tragic, effect. They began to stutter. The constant criticism and labeling fostered a deep-seated anxiety about speaking, leading to genuine disfluencies and a significant decline in their confidence and ability to communicate. What began as normal speech development was systematically derailed.
Emotional and Social Distress
Beyond the stuttering itself, the children experienced considerable emotional and social distress. They became withdrawn, embarrassed by their speech, and often avoided social interactions. The joy of communication was replaced by fear and shame. The orphanage environment, already challenging, became even more difficult for these children who now struggled with a stigmatized speech impediment.
The Unfulfilled Promise of Relief
The children were never informed that the study was designed to induce stuttering. They believed they were receiving help for a problem they didn’t initially have. The lack of honesty and transparency only compounded the betrayal they experienced. They were subjected to a prolonged period of distress with no hope of genuine relief, as the “treatment” was the cause of their suffering.
The “Normal” Children’s Fate
The control group, consisting of children who already stuttered, did not fare much better. While some may have experienced some minor improvements due to increased attention, the overall impact of the study on their lives is less well-documented. However, the ethical failure lies in the experimentation itself, regardless of the outcomes for every single participant. The very act of manipulating speech patterns and instilling fear is what makes the study so abhorrent.
The Unraveling of the Truth: Ethical Outcry and Apology

For decades, the true nature of “The Monster Study” remained largely obscure, known only within academic circles. However, as time passed, the ethical implications began to surface, leading to widespread condemnation and a delayed acknowledgment of the harm caused.
The Role of Journalism
It was the investigative work of a local newspaper reporter, John Cudmore, in 1997, that brought “The Monster Study” to national attention. Cudmore’s article, published in The Des Moines Register, exposed the cruel experiment and its devastating impact on the surviving participants. This journalistic exposé was the catalyst for public outrage.
The “Winnable War” Speech
The name “Monster Study” itself was coined by the participants, who referred to the researchers as “monsters” for what they had done to them. This poignant nickname underscored the profound sense of violation and betrayal they felt. The participants, many of whom had suffered for their entire lives due to the experiment, finally had their voices heard.
Legal and Academic Repercussions
The revelations led to significant public outcry and calls for accountability. While no legal action was taken due to the passage of time and the death of key figures like Wendell Johnson, the academic community faced immense pressure to address the ethical shortcomings of the study. The University of Iowa issued a formal apology to the surviving participants.
The Apology of the University of Iowa
In 2001, the University of Iowa, the institution where the study was conducted, issued a public apology. This apology, while long overdue, was a crucial step in acknowledging the wrongdoings. The university recognized the profound harm inflicted and expressed deep regret for the unethical nature of the research.
Acknowledging the Ethical Breach
The apology acknowledged that the study violated ethical principles and that the participants, particularly the vulnerable children, were subjected to undue harm. It was a recognition that the pursuit of knowledge cannot come at the expense of human dignity and well-being, especially for those unable to protect themselves.
Lingering Questions and Regret
Despite the apology, the scars of “The Monster Study” remained. The surviving participants, many of whom were elderly by the time the study gained widespread attention, carried the burden of their experiences for a lifetime. The regret of those involved, including Mary Tudor, was palpable, though it could never undo the damage.
The Monster Study, a controversial experiment conducted in 1939, aimed to investigate the effects of stuttering on children and has since raised significant ethical questions about psychological research. For those interested in a deeper exploration of the implications of such studies, you can read a related article that discusses the ethical considerations in psychological experiments. This article provides valuable insights into how research practices have evolved over the years and highlights the importance of ethical standards in protecting vulnerable populations. You can find it here: ethical considerations in psychological experiments.
The Enduring Legacy: Lessons Learned and Ethical Guidelines
| Metric | Details |
|---|---|
| Study Name | The Monster Study |
| Year Conducted | 1939 |
| Location | University of Iowa |
| Lead Researcher | Dr. Wendell Johnson |
| Number of Participants | 22 orphan children |
| Participant Age Range | 5 to 12 years old |
| Study Objective | To investigate the effects of positive and negative speech therapy on stuttering |
| Methodology | Children were divided into two groups: one received positive speech therapy, the other negative speech therapy (labeling normal speech as stuttering) |
| Duration | Several months |
| Ethical Issues | Use of vulnerable children without proper consent, psychological harm caused by negative therapy |
| Long-term Effects | Some children developed speech problems and psychological trauma |
| Public Exposure | Study details became widely known in the early 2000s |
| Institutional Response | University of Iowa issued an apology in 2001 |
“The Monster Study” stands as a dark chapter in the history of psychological research, a stark warning against the unbridled pursuit of scientific inquiry without a strong ethical compass. The lessons learned from this unethical experiment have had a lasting impact on research practices and ethical guidelines.
The Belmont Report and Beyond
The ethical violations of studies like “The Monster Study” were instrumental in the development of rigorous ethical guidelines for human research. The Belmont Report, a foundational document in research ethics, emerged from a growing awareness of the need to protect human subjects. It emphasizes three core principles: respect for persons, beneficence, and justice.
Respect for Persons
This principle emphasizes the need for informed consent and the protection of individuals with diminished autonomy. In “The Monster Study,” the children were not able to give informed consent, and their autonomy was severely compromised.
Beneficence
This principle requires researchers to maximize potential benefits and minimize potential harms. “The Monster Study” tragically failed on both counts, inflicting harm with no discernible benefit.
Justice
This principle dictates that the benefits and burdens of research should be distributed fairly. The targeting of a vulnerable population like orphaned children for a potentially harmful experiment clearly violated this principle.
The Importance of Informed Consent
The study underscores the absolute necessity of informed consent. Researchers must ensure that participants, especially vulnerable populations like children, fully understand the nature of the research, its potential risks and benefits, and their right to withdraw at any time.
The Ethical Imperative in Research
“The Monster Study” serves as a perpetual reminder that the pursuit of scientific knowledge must always be tempered by a profound respect for human dignity and well-being. The ethical imperative in research is not a mere suggestion; it is a fundamental requirement that safeguards individuals and upholds the integrity of the scientific enterprise. The legacy of this study continues to inform ethical training and practice, ensuring that such transgressions are never repeated. The whispers of those wronged children serve as a constant echo, reminding us of the profound responsibility that comes with wielding the power of scientific inquiry.
They Told Healthy Children Something Was Wrong With Their Speech
FAQs
What is the Monster Study?
The Monster Study was a controversial psychological experiment conducted in 1939 by Wendell Johnson and Mary Tudor at the University of Iowa.
What was the purpose of the Monster Study?
The purpose of the Monster Study was to investigate the effects of negative speech therapy on children’s speech development and self-esteem.
How was the Monster Study conducted?
The study involved dividing children into two groups – one group received positive speech therapy, while the other group received negative speech therapy, which involved criticism and labeling their speech as “monstrous.”
What were the ethical concerns surrounding the Monster Study?
The Monster Study faced criticism for its unethical treatment of children, as the negative speech therapy had lasting psychological effects on the participants, causing feelings of low self-esteem and speech issues.
What was the aftermath of the Monster Study?
The Monster Study led to changes in ethical guidelines for conducting research on human subjects, highlighting the importance of informed consent and the need to prioritize the well-being of participants in psychological experiments.