EDUC 10 Chapter Notes - Chapter 7: Ex Post Facto Law, Statistical Significance, Logistic Regression
Document Summary
Investigate the current or past statuses of something: describes participants, traits, scores, and other characteristics without direct or active intervention, descriptive studies. Conclusions about relationships should be made with caution. A relationship or association is found when one variable varies systematically with another variable. Systematic variation between two variables: comparative studies. Investigate the relationship of one variable to another by examining whether the value of the dependent variable in one group is the same or different from the value of the dependent variable of other groups. Compares two or more groups on one or any variables. Subjects, instrumentation and procedures should be well described. Do not infer causation from comparative research designs. Graphic presentations should not distort the results: correlation studies. Two or more variables are related with the use of one or more correlation coef cients. Relationships are indicated by obtaining at least two scores from each subject. Correlation coef cients show how on variable can predict another.
