Psychology 1000 Lecture 5: Sept 20: statistic in psychology

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Atkinson

Document Summary

Manipulating 2 variables: using phones or not in high/low traffic density. If we re-ran the study what would be the likelihood that we find the same thing. Effect size: what is the magnitude of the observed effect?, small/medium/large. Measures of central tendency: single number to describe the data. Mean( average of all scores), median (middle score, halfway point), mode (most frequent score) Range (max-min), standard deviation (sd), variance sd2. Factor analysis: intercorrelations among: asking a program to calculate the correlation between the data. Null hypothesis: there is no difference between groups (no effect of the independent variables on the dependent variable)==> any observed difference is due purely to chance. The no-hypothesis: aggression than non-violent control group null hypothesis: violent video game group will not. Our experimental hypothesis: the violent video game group will display a higher level of display a higher level of aggression than non-violent control group.