Cognitive Biases and Their Impact on Well-Being

How Our Brain Deceives Us

Our brain processes approximately 11 million bits of information per second, but our conscious mind handles only 40 to 50. To bridge this gap, the brain uses mental shortcuts called heuristics. These shortcuts are useful in daily life, but they produce cognitive biases — systematic thinking errors that distort our perception of reality.

In clinical psychology, these biases are at the heart of the cognitive distortions identified by Aaron Beck, the father of cognitive therapy.

Cognitive Distortions That Harm Mental Health

1. All-or-Nothing Thinking (Dichotomous Thinking)

Seeing things in black or white, with no nuance.

"If I don't succeed perfectly, it's a total failure."

Impact: paralyzing perfectionism, procrastination, depression after a minor setback.

Antidote: Ask yourself "Is there a middle ground?" and evaluate the situation on a scale of 0 to 10 rather than in absolutes.

2. Overgeneralization

Drawing a broad conclusion from a single event.

"My colleague didn't say hello this morning. Nobody likes me."

Impact: feelings of helplessness, social withdrawal, self-fulfilling prophecies.

Antidote: Look for counterexamples. "Is this really always the case?"

3. Mental Filter (Selective Abstraction)

Focusing exclusively on a negative detail while ignoring everything else.

Receiving 50 compliments and 1 criticism, and only remembering the criticism.

Impact: distorted view of reality, rumination, decreased self-esteem.

Antidote: Keep a journal of successes and positive feedback.

4. Disqualifying the Positive

Systematically turning positive experiences into neutral or negative ones.

"They congratulated me, but it's just politeness."

Impact: inability to feel satisfaction, impostor syndrome.

Antidote: Accept compliments with a simple "thank you" and note what you did to earn them.

5. Emotional Reasoning

Taking your emotions as proof of reality.

"I feel incompetent, therefore I am incompetent."

Impact: negative emotions become "truths" that reinforce distress.

Antidote: "What I feel is real, but it's not necessarily reality."

6. Personalization

Taking responsibility for events beyond your control.

"My friend is in a bad mood. I must have done something wrong."

Impact: excessive guilt, relationship anxiety.

Antidote: Distinguish what depends on you from what doesn't (Stoic principle).

The Cognitive Model: Thoughts, Emotions, and Behaviors

Cognitive-behavioral therapy is built on a fundamental principle: it's not events that cause our emotions, but our interpretation of them.

graph TD
    A[Triggering event] --> B[Automatic thought]
    B --> C[Emotion felt]
    C --> D[Behavior adopted]
    D --> B
    style A fill:#42A5F5,color:#fff
    style B fill:#FF7043,color:#fff
    style C fill:#AB47BC,color:#fff
    style D fill:#66BB6A,color:#fff

Concrete Example

The same event produces radically different outcomes depending on interpretation.

Beck's Column Technique

Aaron Beck developed a practical tool for identifying and restructuring negative automatic thoughts:

The 5 Columns

1. Situation: What happened? (objective facts only)
2. Automatic thought: What crossed my mind?
3. Emotion: What did I feel? (intensity from 0 to 100)
4. Cognitive distortion: Which bias is at play?
5. Alternative thought: What more realistic interpretation can I formulate?

Practical Exercise

For the next 7 days, fill in this table each time you experience an intense negative emotion:

Positive Cognitive Biases: When the Brain Protects

Not all biases are negative. Some contribute to our well-being:

• Optimism bias: natural tendency to overestimate positive outcomes — it drives us to take action
• Illusion of control: believing we can influence events — it strengthens motivation
• Positivity bias: as we age, we retain positive memories better

The goal is not to eliminate all biases, but to become aware of those that cause suffering so we can challenge them.