PS102 Lecture Notes - Lecture 6: Blind Experiment, Observer-Expectancy Effect, Selection Bias
Document Summary
The cure for experimenter bias and placebo effect. Blind and double blind techniques: using techniques to blind both the experimenter and the participants. By controlling so many control variables, creates artificial setting. Hypothesis falsifiable (can be proven wrong though systematically observation/ data) and testable prediction. Based on data collected can support the theory or invalidate it. Reasonable incentives: can not prove excessive compensation. Include measure of central tendency (mean/ mode/ median) Also measures of variability (standard deviation, t test and correlation) See if the study can be applied to populations as a whole. Used to give basic information about what we find. Provides a summary/ frequency distribution or table. Variability gives how much variability a score has from the mean: little variability all bunched up close to the mean, lots of variability wide curve. Measures of central tendency: mean average. Add all the scores, then divide by the number of scores: is more affected by outliers.
