Psychology 2070A/B Chapter Notes - Chapter 2: Internal Validity, Informed Consent, Hindsight Bias

• School: Western University
• Department: Psychology
• Course: Psychology 2070A/B
• Professor: Graeme Haynes

Document Summary

People exaggerate how much they could have predicted on an outcome after knowing it happened: knew this all along . Theory: organized set of principles that can be used to explain observed events. Hypothesis: testable statement or idea about the relationship between two or more variables. The more people who witness an emergency, the less likely it is that any given individual will intervene: diffusion of responsibility, someone else will do it . Operational definition: precise specification of how variables are measured or manipulated. If you want to describe what a particular group of people or type of behaviour is like. Technique where a researcher observes people and systematically records measurements of their behaviour: varies according to the degree to which the observer actively participates in the scene. Focuses on description: what is the nature of this phenomenon answered. Interjudge reliability: level of agreement between two or more people who independently observe and code a set of data.