APSY2216 Lecture Notes - Lecture 12: Dependent And Independent Variables, Railways Act 1921, Internal Validity

• School: Boston College
• Department: Counseling, Developmental, and Educational Psychology
• Course: APSY2216
• Professor: Thomson

Document Summary

Friday, we will hopefully discuss survey research. Be sure to include assent form in addition to consent form if your research involves children. Only type of research that attempts to influence a particular variable. In associational research, the change we are studying is the already-existing variation. In experimental research, we create the change so we can study the effects of that change. Best type of research for testing hypotheses about cause-and-effect relationships. Also allows us to test effective (cid:498)mechanisms of change,(cid:499) which is important for designing policy, practice, and interventions. Also referred to as experimental variable or treatment variable. Grouping variable - at least two groups compared. Most often a categorical variable, but continuous is possible (ex: treatment exists on a continuum of. Also referred to as criterion or outcome variable. Variable on which we compare differences in groups. Ex: achievement (cid:883) gets (cid:883) hour, group (cid:884) gets (cid:884) hours, etc. Time watching tv is a continuous iv.