COMM 1 Lecture Notes - Lecture 5: Teddy Bear, Cortisol, Blood Pressure
23 May 2020
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Document Summary
Conceptualizing your variable: defining what the concepts mean for purpose of investigation, usually based on theory/prior research. Physiological measures: blood pressure, brain imaging, cortisol (stress hormone) Behavioral/observational measures: nonverbal gestures, time/money spent, actual posts on social media. Items on questionnaire: **survey is a method of experimenting, questionnaires/measurement instrument are the physical piece of paper. Ordinal: variable is measured with rank ordered categories: ex: rank top five favorite tv shows, most to least important political issues. Issue you don"t know how much more/extreme (if your #1 favorite is miles ahead or barely tied for #2); difficult to do statistics with. Interval: variable is measured with successive points on a scale with equal intervals between them: ex: measure of attitude about parenting, parents should talk openly with their children about sex. (scale from 1- Ratio: interval measurement with a true, absolute zero point: ex: time in hours, weight in lbs. , age in years, etc. Common for iv and dvs in surveys.
