PSYC 217 Lecture 1: Week 13 Lecture Notes - 1
Document Summary
Two broad categories of sampling techniques: probability sampling: participants are randomly drawn, likely representative of population, high generalizability, non-probability sampling: participants not drawn at random, easy and convenient, low generalizability. Simple random sampling: everyone in a population has equal chance of being chosen. Cluster sampling: if clusters exist within a population, randomly sample clusters rather than individual members. Strati ed random sampling: identify subgroups within population. Identify proportion of people in population belonging to subgroups. Randomly draw samples from subgroups to re ect proportion in population. Random assignment: eery participant has equal chance of being in any experimental condition in a study. Individual differences are no evenly spread different conditions. Random sampling: (random selection) every person in the population has equal chance of being chosen to participate in the study. allows for high external validity (generalizability). (see slide) Convenience sampling: recruit participants whenever and wherever you can.
