PSYC 1010 Chapter Notes - Chapter 5: Alternative Hypothesis, Null Hypothesis, Type I And Type Ii Errors
Document Summary
Every member of the population has an equal chance of being selected into the study. Limits our generalizability (researchers ability to apply findings from one sample or in one context to other samples or contexts) if it results in a sample that is not representative of the population. Volunteer sample- special kind of convenience sample in which participants actively choose to participate in a study, participants volunteer or self-select. Random assignment is frequently used, refers to a method we can use once we have a sample, whether or not the sample is randomly selected. Random sample is hardly ever used, refers to a method of creating a sample from a population. If a study has two levels of iv, then participants are randomly assigned to one of two groups. Although some patterns may be seemingly non random, they are still considered to be random. We still run the risk of an accidentally biased sample giving us bad information.
