Thinking Like a Scientist: Introduction to Research Methods

The Importance of Critical Thinking00:00:00

Dr. Kate Hutton Bedbrook introduces the 'Measuring Life and Behaviour' course, emphasizing that critical thinking is a learnable skill necessary for evaluating evidence, designing experiments, and making informed decisions in an era overwhelmed by information. The course aims to teach students how to think like scientists, evaluate scientific claims, and move beyond subjective beliefs.

Common Sources of Information00:00:00

The lecture identifies four unreliable 'common sources' that people often use when making decisions: common sense (folk wisdom), superstition/intuition, authority figures, and tenacity (repeating unverified claims until accepted as truth). These sources are criticized for their lack of systematic evidence, susceptibility to bias, and failure to account for contradictory data.

Core Assumptions of Science00:00:00

Scientific thinking is built upon key assumptions: scientific determinism (there is an orderly causal structure to phenomena), parsimony (Occam's razor—preferring the simplest explanation with the fewest assumptions), and empiricism (the requirement for systematic, physical, and verifiable evidence). The lecture highlights that 'extraordinary claims require extraordinary evidence.'

Verification and Falsification00:00:00

A critical component of the scientific method is testability. Unlike the process of merely confirming a belief, scientific thinking requires falsification—actively looking for evidence that could refute a claim. The lecture warns against confirmation bias and stresses that a valid scientific theory must be open to being proven wrong, distinguishing rigorous scientific inquiry from non-falsifiable ideologies.