SOC221H5 Study Guide - Final Guide: Treatment And Control Groups, Internal Validity, Dependent And Independent Variables
Document Summary
Post-test: measurement of the dependent variable after the experimental. Internal validity: some events that occur after treatment is given may influence the dependent variable, the pre-test may have influenced the dependent variable. Lecture nine: both the questions and answers are structured, all respondents must answer the same questions in the same order, ex: public opinion surveys. Reducing interviewer variability: poorly worded questions, interviewer error in asking a question, interviewee misunderstanding, interviewee laps in memory, interviewer error in recording information, mistakes in entering the data into a computer, biases caused by the interviewer or interviewee. Advantages: reduce chance of variation on the part of the interviewer, enhance accuracy of data processing due to closed/fixed questions. The interviewees put themselves into categories by answering the questions. Weaknesses: cheaper and quicker to, may exclude people without administer, easier to supervise phones, unlisted numbers, cells phones etc. reduces interviewer error, are hard to sustain for long, reduces bias from the.
