PSY 250 Lecture 14: Two Independent Group Designs
17 Mar 2016
School
Department
Course
Professor
Document Summary
Experimental design: goals, two independent group design. Research design: the outline, plan, or strategy used to invesigate a quesion. Main goal of experimental research designs: determine cause, to do this, you need to: manipulate an iv, and control extraneous variables, good vs. bad designs, bad designs are much easier to do than good designs. Because good designs require a lot of work and thought. Two independent groups (paricipants in one group are not paricipants in another group). Other variaions: ideal dosage for new drug: 50mg v. 100mg. As long as : holding them constant or randomizing everything else. , controlling extraneous variables. Ex: drooling & lachman (1971): properies of memory: gave students at ub a passage to read, and were told to try to recall as many words as they could, iv: title of story (absent vs. Title: christopher columbus journeys to america : dv: number of words remembered, findings: Having a itle serves as a que to help us remember.
