FRHD 3070 Lecture Notes - Lecture 12: Observational Error, Test Anxiety, Nominal Number

• School: University of Guelph
• Department: Family Relations and Human Development
• Course: FRHD 3070
• Professor: John Dwyer

Document Summary

Conceptual definition (cid:449)hat is it that (cid:455)ou"(cid:396)e t(cid:396)(cid:455)i(cid:374)g to (cid:373)easu(cid:396)e. Operational definition sequence of steps o procedures that a researcher follows to obtain a measurement (come up with a way of measuring it) Example: my favorite dessert cheesecake: operational definition = steps used to make marble cheesecake (standardized) Observed score = true score (what you actually have as knowledge) + systematic error + random error. Variable (achievement test) has 3 components: construct of interest achievement, constructs of disinterest motivation, test-wise, test anxiety, english proficiency, random errors grading mistakes, recording mistakes. Example: levels = nominal (frequencies), ordinal (frequencies median), interval/ratio (frequencies; median; mean, characteristics of 4 levels of measurement = mutually exclusive, ranked, equal intervals, true zero. Class activity example of nominal, ordinal and interval/ratio levels of measuring: nominal number you get when you register, ordinal (cid:449)i(cid:374)(cid:374)e(cid:396)/se(cid:272)o(cid:374)d/thi(cid:396)d/fou(cid:396)th et(cid:272). (cid:894)(cid:272)o(cid:374)ti(cid:374)uu(cid:373), (cid:271)ut do(cid:374)"t know time in between)