PSYC 2001 Lecture Notes - Lecture 15: Null Result, Dependent And Independent Variables, Internal Validity
11 Nov 2016
School
Department
Course
Professor
Document Summary
Ideal: ideally, only the independent variable moves the dependent variable. Reality: other factors (+/-) affect the dependent variable. For example: testing students reading progress; the progress may be due to factors other than the teacher (like reading at home) Compromise between ideal and reality: to make the effect of the. Independent variable clearer, make the effect of the independent variable bigger and/or effects of other factors smaller. Operationally define and manipulate independent variables using. May need to create a physiological stat such as anger, anxiety (easier if. Operationally define and manipulate independent variables involving a. For example: memory task: pictures of word stimuli (quinlan 2010). Asked series of staged events, after which responses are recorded. Desire to replicate a (cid:498)real world(cid:499) scenario. Obscuring factors (cid:498)things(cid:499) that make an effect hard to observe and which. Rats and food intake (adolph, 1947) compare rats fed regular lab food more of the more attractive, sweetened food; adolph"s conclusion: rats.
