Lesson 01

Updated 4 Oct 2026

What is Critical Thinking?

Definition and Etymology

  • Critical comes from Greek word "kritikos" meaning "to judge or decide"
  • Critical Thinking: A collection of skills we use every day that are necessary for our intellectual & personal development
    • Requires knowing how to think rather than what to think
  • Logic: The study of methods & principles used to distinguish good arguments from poor arguments
  • Opinion: A belief based on personal feelings rather than on reasons or fact

Critical Thinking in Everyday Life

  • Opinions are not always reasonable and can be correct or wrong regardless of how sincerely held
  • Critical thinkers must provide logical support for beliefs
  • Uninformed opinions can lead to poor decisions
  • Example: Patients demanding antibiotics for viral infections leading to drug-resistant bacteria

Historical Context: Authority and Obedience

Adolf Eichmann Trial (1960)

  • Nazi war criminal tried for crimes against humanity
  • Claimed he was following superior orders when ordering deaths of millions of Jews
  • Court found him guilty and sentenced him to death despite claims of following authority

Milgram Experiment (1960-1963)

  • Purpose: Study cruelty and inhumane acts from WWII
  • Setup: Volunteers told to give electric shocks for learning mistakes
  • Results:
    • All volunteers gave 300v punishments
    • 65% went all the way to 450v because authority figure encouraged continuation
    • Key Question: "How far would ordinary citizens go to obey an authority figure?"

Stanford Prison Experiment (1971)

  • Purpose: Study effect of power differences in prison settings
  • Setup: Random assignment of prisoner/guard roles with costume identity removal
  • Results:
    • Guards became cruel, especially when unmonitored
    • Prisoners were asked to clean toilets with bare hands
    • Prisoners suffered emotional, physical, and sexual abuse
    • Experiment went out of control

Key Lesson

Many people will follow harmful orders if they come from authority figures

Factors Affecting Critical Thinking Ability

  • Cognitive development stage
  • Good analytical skills
  • Communication & research skills
  • Open-mindedness
  • Flexibility
  • Creativity

Cognitive Development in College Students (Perry's Model)

  • Educator William Perry’s (1913-1998) study proposed 9 stages but later researchers simplified them into 3 stages.

Stage 1: Dualism

  • Thinks in black and white: right or wrong
  • Relies on authority figures for answers
  • Struggles with grey areas or controversy
  • Prone to confirmation bias (seeking evidence that supports views while dismissing contradicting evidence)

Stage 2: Relativism

  • Believes truth is relative; everyone has their own opinion
  • Thinks all opinions are equally valid
  • Avoids judging others' views
  • Gets stuck when choices conflict
  • Expects authority figures to support their views

Stage 3: Commitment

  • Realizes some opinions are stronger than others
  • Knows that experts can be wrong
  • Accepts that life has uncertainty
  • Makes thoughtful decisions in unclear situations
  • Open to change when new evidence appears

8 Characteristics of a Good Critical Thinker

1. Analytical Skills

  • Analyze and provide support to your own beliefs

2. Effective Communication

  • Awareness of communication style, cultural variations, and gender differences

3. Research & Inquiry Skills

  • Understanding and resolving issues require research skills
  • Asking the right questions

4. Flexibility & Tolerance for Ambiguity

  • Ability to evaluate conflicting views
  • Decision-making despite uncertainty requires short and long-term goals
  • Critical thinkers adapt to changes

5. Open-Minded Skepticism

  • Balance of doubt and belief
  • Uses Method of Doubt (What if the idea is wrong?) and Method of Belief (What if the idea is right?)
  • Overcoming personal prejudices and biases

6. Creative Problem-Solving

  • View problems from multiple perspectives
  • Use imagination to see possibilities and potential future problems
  • Develop contingency plans

7. Attention, Mindfulness, & Curiosity

  • Similar to Buddhist "beginner's mind" (wisdom that seeks wisdom)
  • Don't reject conflicting views without sound reason
  • Practice mindfulness and openness to what's happening

8. Collaborative Learning

  • Move beyond isolated thinking
  • Develop collaborative approach through shared dialogue and community

Critical Thinking & Self-Development

Critical Thinking helps us live more thoughtful and successful lives.

Personal Growth Benefits

  • Helps live more thoughtful and successful lives
  • Many people feel lost because they don't reflect on life or future
  • Critical thinkers take time to reflect and make better choices
  • Poor thinking and false beliefs lead to sadness, anger, or low self-esteem
  • Setting goals, thinking clearly, and facing problems honestly improves well-being

Socratic Wisdom

"The unexamined life is not worth living" - Socrates

Democracy Connection

  • Democracy requires citizen participation in decision-making
  • Citizens should learn about important issues and policies
  • Experience with diverse people increases community care and democratic participation

Barriers to Critical Thinking

The Three-Tier Model of Thinking


(From bottom-to-top)

1. Experience

  • Foundation of critical thinking & argumentation
  • Includes firsthand experience, information, or empirical facts from other sources
  • Examples:
    • Human cloning is illegal in the United States
    • I was turned down for a job I interviewed for

2. Interpretation

  • Trying to make sense of our experience
  • Includes individual interpretation of collective & cultural worldviews
  • May or may not be well-informed
  • Examples:
    • If human cloning is illegal, it must be immoral
    • I didn't get the job because I didn't have the right connections

3. Resistance (Before Analysis)

  • Using immature defense mechanisms that are rigid, impulsive, maladaptive, & non-analytical
  • Forms of Resistance:
    • Avoidance
    • Conformity
    • Anger
    • Struggling
    • Cliché
    • Distraction
    • FDenial
  • Most people hate being proven wrong and create barriers to protect worldviews

4. Analysis

  • Requires raising the level of thinking & critically examining interpretations
  • Examines our experience and those of others
  • Rejection of overly narrow or broad interpretations
  • Most productive when done collectively
  • Examples:
    • Are there circumstances in which human cloning is acceptable?
    • Was it my lack of connections or poor interview skills that caused me not to get the job?

Narrow-Mindedness

  • Worldviews that foster narrow-mindedness block analysis of experiences and perspectives
  • People resist challenges to beliefs, especially when supported by law or public opinion

Types of Narrow-Mindedness:

Absolutism
  • Lacking critical thinking skills
  • View that things are either right or wrong
  • Expectation that authorities provide correct knowledge
Fear of Challenge
  • Especially affects people with low self-esteem or egocentric personality
  • Resist information & evidence that contradict beliefs
  • View challenges as personal attacks
Egocentrism
  • Belief that the self or individual is the center of all things
  • Little regard for others' interests & thoughts
Ethnocentrism
  • Belief in the inherent superiority of one's own group & culture
  • Characterized by suspicion & lack of knowledge of foreign countries & cultures
  • Makes judgments about other groups based on stereotypes
Anthropocentrism
  • Belief that humans are the central or most significant entities of the universe

Rationalization & Doublethink

Rationalization

  • Providing reasons for biased decisions
  • Used to justify past actions inconsistent with personal image of being decent and rational

Doublethink

  • Holding two contradictory views simultaneously and believing both to be true
  • Examples:
    • Believing in gender equality & believing females are better suited for childcare and patient care
    • Believing in racial equality & keeping implicit racial biases

Doublethink Impact Examples

  • Women working outside home still perform majority of housework and childcare
  • Pay gap between women and white males persists
  • Despite evidence, college students insist workplace discrimination is "a thing of the past"

Cognitive & Social Dissonance

  • Cognitive Dissonance: Disorientation when new ideas conflict with worldview
  • Social Dissonance: Disorientation when others' norms and behaviors conflict with our worldview
  • Working/studying in diverse communities can challenge ethnocentric attitudes
  • Behavior change often leads to belief change