Preface
1 Psychology Is Alive and Well (and Doing Fine Among the Sciences)
The Freud Problem
The Diversity of Modern Psychology
Implications of Diversity
Unity in Science
What, Then, Is Science?
Systematic Empiricism
Publicly Verifiable Knowledge: Replication and Peer Review
Empirically Solvable Problems: Scientists' Search for Testable Theories
Psychology and Folk Wisdom: The Problem with Common Sense
Psychology as a Young Science
Summary
2 Falsifiability: How to Foil Little Green Men in the Head
Theories and the Falsifiability Criterion
The Theory of Knocking Rhythms
Freud and Falsifiability
The Little Green Men
Not All Confirmations Are Equal
Falsifiability and Folk Wisdom
The Freedom to Admit a Mistake
Thoughts Are Cheap
Errors in Science: Getting Closer to the Truth
Summary
3 Operationism and Essentialism: But, Doctor,What Does It Really Mean?
Why Scientists Are Not Essentialists
Essentialists Like to Argue About the Meaning of Words
Operationists Link Concepts to Observable Events
Reliability and Validity
Direct and Indirect Operational Definitions Scientific Concepts Evolve
Operational De nitions in Psychology
Operationism as a Humanizing Force
Essentialist Questions and the Misunderstanding of Psychology
Operationism and the Phrasing of Psychological
Questions
Summary
4 Testimonials and Case Study Evidence:
Placebo Effects and the Amazing Randi
The Place of the Case Study
Why Testimonials Are Worthless: Placebo Effects
The Vividness Problem
The Overwhelming Impact of the. Single Case
The Amazing Randi: Fighting Fire with Fire
Testimonials Open the Door to Pseudoscience
Summary
5 Correlation and Causation: Birth Control by the Toaster Method
The Third-Variable Problem: Goldberger and Pellagra
Why Goldberger's Evidence Was Better
The Directionality Problem
Selection Bias
Summary
6 Getting Things Under……