Concise Summary of Scientific Methodology in Psychology

The Need for Scientific Methodology

  • Experimental Psychology: Uses scientific methods to study mind and behavior.
  • Methodology: Scientific techniques for collecting and evaluating data.
  • Data: Facts gathered through scientific methods.

Commonsense Psychology

  • Sources of Knowledge: Philosophy, folk wisdom, common sense, etc. are non-scientific sources.
  • Non-scientific Inference: Utilizes common sense data leading to potentially misguided conclusions (e.g., gambler's fallacy, overconfidence).

Importance of Scientific Mentality

  • Natural Order: Science assumes behavior follows a predictable natural order.
  • Empirical Data: Observed/experienced data leads to more accurate conclusions.

Understanding Laws and Theories

  • Laws: Well-supported statements (e.g., Laws of Thermodynamics).
  • Theories: Explanations that integrate data and predict phenomena.

Good Thinking Principles

  • Good Thinking: Involves systematic, objective, and rational approaches.
  • Parsimony: Simplest explanation is preferred.
  • Self-Correction: Science revises theories based on evidence.

Role of Replication and Modus Tollens

  • Replication: Repeating studies enhances confidence in results.
  • Modus Tollens: Disproves statements with contrary observations.

Objectives of Psychological Science

  • Four Main Objectives:
    • Description: Objective account of behaviors.
    • Prediction: Anticipating behaviors.
    • Explanation: Understanding conditions for behavior.
    • Control: Using knowledge to influence behavior.
  • Applied vs Basic Research: Applied addresses real-world issues; basic tests theories.

Tools of Psychological Science

  • Main Tools:
    • Observation: Systematic noting and recording of events, must be objective.
    • Measurement: Assigning numbers to characteristics, typical in quantitative research.
    • Experimentation: Testing hypotheses and establishing cause-and-effect relationships.

Experiment Requirements**

  • Manipulation of independent variable and measurement of its effect on the dependent variable.
  • Must create treatment conditions and control extraneous variables.

Cause and Effect in Experiments

  • Establishes cause-and-effect relationships; causes precede effects.

Pseudosciences**

  • Appear scientific but lack true scientific basis, not confirmed by scientific method (e.g., past life regression).