CSC428H1 Chapter Notes - Chapter 5: Experimental Psychology, Input Device, Likert Scale
Document Summary
Ch 5: experimental design (week 5 02. 08, week 6 02. 22: methodology = way an experiment is designed, carried out, hci experimental research = factorial experiments participants are: Exposed to levels of factors = test conditions. Behavior is observed, measured: hci methodologies experimental psychology, apa, ethics approval = ensure research respect safety, welfare, dignity of human participants treated equally and fairly, random variables = would-be control variables allowed to vary. Pro: more external validity variety of situations/persons. Con: less internal validity comprised by additional variability. Control vs. random trade-off: confounding variables = circumstances vary systematically with an iv. Problematic, need to consider/eliminate/adjust for it control. Ex. experiment with google vs. new search engine. (1) nature of research = goals, hypotheses, objectives. (2) research methodology = procedures, questionnaires, etc. (3) can refuse participate at any time w/o prejudice/penalties. (4) anonymity, confidentiality: starting experiment design, goal: decide variables, tasks & procedures, participant sample size/method, etc. (1) represent activities users expected/actually do with interface.
