Confirmation Bias and the Danger of Misperception in Hello Stranger by Katherine Center

The Mechanics of Misperception: Trauma, Face Blindness, and Confirmation Bias in Hello Stranger

In Hello Stranger, Katherine Center builds a thematic argument that confirmation bias—the tendency to seek out and interpret evidence that supports what we already believe—becomes dangerously amplified when a person is coping with trauma and sensory impairment. The novel’s protagonist, Sadie Montgomery, acquires prosopagnosia, or face blindness, after brain surgery for a cavernoma. This condition strips her of her most reliable tool for reading other people: their faces. In the vacuum left by that loss, her mind fills in the gaps with assumptions shaped by fear, grief, and a history of emotional wounds. The result is a series of misperceptions that nearly derail her life—most notably her conviction that Joe is a predatory womanizer. Through Sadie’s journey, Center argues that the antidote to confirmation bias is not simply gathering more evidence, but actively choosing to look for the good in others—a practice that requires humility, self-compassion, and a willingness to be wrong.

Tracing the Theme Across the Plot

1. The Misjudgment of Joe: Constructing a Villain from Fragments

The most vivid demonstration of confirmation bias occurs in the middle of the novel, after Sadie has returned home from the hospital. She overhears a man on the phone making offensive remarks about a woman, and she later sees a man in a bowling jacket—whom she identifies as Joe—in the hallway of her building. Because she cannot see faces, she relies on context clues: the jacket, the location, the timing. She immediately assumes the man on the phone is the same person, and from that single overheard call, she builds an elaborate narrative. In Chapter Eleven, she tells her friend Sue that Joe is “sleeping with half the women in my building, mocking them in elevators the next day, and possibly extorting them for money.” Sue, feeding the spiral, helps her coin nicknames like “Joe the Womanizer.” Sadie even considers calling the police.

The evidence she cites is flimsy: one overheard phone call and a few sightings where she “darted into the shadows” to avoid being seen. Yet she declares, “The evidence is pretty damning.” Her therapist, Dr. Nicole Thomas-Ramparsad, immediately challenges her: “What evidence? There’s no evidence. You’re talking about one overheard phone call and a few sightings in the hallway.” Dr. Nicole names the phenomenon: “You’re doing it a little extra right now” because “your senses are off” and “you’ve experienced trauma, you’re on high alert for danger.” This scene crystallizes the novel’s thematic claim: when our perceptual tools fail, our cognitive biases rush in to fill the void, and trauma makes us more likely to interpret ambiguous information as threatening.

2. Therapy and the Naming of Confirmation Bias

The second major plot movement is Sadie’s ongoing work with Dr. Nicole, who explicitly teaches her about confirmation bias. In the same session where she confronts Sadie about Joe, Dr. Nicole defines it: “We tend to think what we think we’re going to think.” She explains that people “decide on what the world is and who people are and how things are—and then we look for evidence that supports what we’ve already decided. And we ignore everything that doesn’t fit.” This is a direct articulation of the theme. Dr. Nicole connects it to Sadie’s condition: because her senses are unreliable, she cannot collect solid information, and because of her mother’s death and her recent surgery, she is primed to expect danger.

The therapy sessions also introduce the countermeasure: “The trick is to look for the good stuff.” Dr. Nicole challenges Sadie to argue herself into optimism, even when she doesn’t believe it. In Chapter Four, she asks Sadie to consider probabilities: if there’s a 5% chance something bad will happen and a 95% chance things will be fine, which is more likely? Sadie answers correctly, but Dr. Nicole pushes her to “practice the art of self-encouragement.” This is not naive positivity; it is a deliberate cognitive strategy to counteract the bias toward negativity. The novel thus frames confirmation bias as a habit of mind that can be retrained, but only with effort and self-awareness.

3. The Epilogue: Reflection and the Choice to See Good

The epilogue, set one year after the party, shows Sadie’s growth. She reflects on how therapy and accepting help changed her. She acknowledges that she still occasionally mistakes strangers for Joe—she has “walked up to Joe in Maria’s grocery store more than once and put my arms around him—only to realize I’ve just freaked out a total stranger.” But now she responds with humor and humility rather than fear. She explicitly names the theme: “We’re all so steeped in our own confirmation bias. We’re all so busy seeing what we expect to see.” Yet she also notes that “we have our moments” of kindness and connection. Her final insight is the novel’s thesis: “The more good things you look for, the more you find.” This is not a denial of reality but a conscious choice to direct attention toward evidence of goodness, counteracting the bias that had once led her to misjudge Joe so severely.

Character and Symbol Connections

The theme is deeply embedded in the novel’s character dynamics. Sadie’s trauma—her mother’s death from a burst cavernoma, her strained relationship with her father, her abandonment of premed for art—makes her hypervigilant. Her face blindness compounds this by removing her ability to read expressions, which are a primary source of social information. Joe, the object of her misperception, is a symbol of the danger of judging by appearances. His bowling jacket becomes a visual shorthand that Sadie latches onto; she cannot see his face, so she defines him by that jacket and by the overheard call. The jacket is a symbol of how we reduce people to superficial markers when we lack deeper knowledge.

The mother’s pink dress is another key symbol. Sadie wears it on the day of her seizure, and it is later incinerated in the hospital. The dress connects her to her mother’s legacy as a portrait artist and to her unresolved grief. That grief fuels her tendency to expect loss and betrayal, making her more susceptible to confirmation bias. The rooftop apartment represents her isolation—a former caretaker’s shack where she hides from the world. It is a physical manifestation of her retreat from social connection, which in turn limits her opportunities to correct her misperceptions. Finally, Bean Street Coffee is where she waits for Dr. Addison, whom she has idealized as her future husband based on a single meeting. That scene shows the flip side of confirmation bias: she is so convinced he will come that she misreads every man who enters as him, and when he doesn’t show, she feels stood up. The coffee shop becomes a stage for her self-deception.

Complexity and Contradiction

The novel does not present confirmation bias as a simple villain. It acknowledges that sometimes our biases are correct—Parker, for instance, is genuinely cruel, and Sadie recognizes her not by face but by “the cruelty” and the scent of Dior’s Poison. This complicates the theme: the danger is not that we are always wrong, but that we cannot reliably distinguish between accurate intuition and biased projection. Sadie’s misjudgment of Joe is dangerous because it nearly leads her to call the police on an innocent man. Yet her initial crush on Dr. Addison, built on almost no evidence, gives her hope and motivation during a dark time. The novel suggests that confirmation bias is a double-edged sword: it can protect us from real threats, but it can also blind us to the good in others.

The resolution is not that Sadie becomes perfectly objective. She still mistakes strangers for Joe, and she still has moments of doubt. But she learns to hold her judgments lightly, to laugh at her own errors, and to extend compassion to herself and others. This is the novel’s answer to the danger of misperception: not the elimination of bias, but the cultivation of humility and the deliberate practice of looking for the good.

Study Questions and Answers

1. How does Sadie’s prosopagnosia amplify her confirmation bias about Joe?

Sadie cannot see faces, so she relies on context clues like the bowling jacket and an overheard phone call. Because she is already on high alert for danger due to trauma, she interprets these ambiguous cues as evidence that Joe is a womanizer and extortionist, ignoring any alternative explanations.

1. What specific technique does Dr. Nicole teach Sadie to counteract confirmation bias?

Dr. Nicole teaches Sadie to “look for the good stuff” and to argue herself into optimism, even when she doesn’t believe it. She also encourages Sadie to question her assumptions and to consider probabilities rather than fixating on worst-case scenarios.

1. How does the epilogue show Sadie’s growth in relation to the theme?

In the epilogue, Sadie acknowledges that she still occasionally mistakes strangers for Joe, but she responds with humor and compassion instead of fear. She explicitly reflects on confirmation bias and concludes that “the more good things you look for, the more you find,” indicating a deliberate shift in her attention.

1. What role does the bowling jacket play in the theme of misperception?

The bowling jacket is a visual marker that Sadie attaches to Joe when she cannot see his face. It becomes a symbol of how we reduce people to superficial attributes when we lack deeper knowledge, and it fuels her biased narrative about him.

1. How does the novel complicate the idea that confirmation bias is always harmful?

The novel shows that bias can sometimes be accurate—as with Parker, who is genuinely cruel. It also shows that Sadie’s idealized view of Dr. Addison, though based on little evidence, gives her hope. The danger lies not in having biases but in failing to question them and in letting them override compassion.