FRHD 3070 Lecture Notes - Lecture 5: Thurstone Scale, Item Number, Guttman Scale

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

Document Summary

Homeless youth are less depressed, guelph study suggests. Half of homeless use kept a pet while the other half did not. Homeless youth with pets were 3 times less likely to be depressed and used drugs. Observed score = true score + systematic error + random error. Motivation, test wise, test anxiety, english proficiency. Variable has 3 components: example - achievement test. Extent to which a measure reflects only desired construct without contamination from other constructs. Conceptual definition needs to match your operational definition. At face value, the measure represents the construct. Define your construct and then you measure it. Looks like a duck, walks like a duck, quacks like a duck, should be a duck . Ex. social physique anxiety, self esteem survey, Measures represent all of the content/subdomains of interest. Ex. self esteem: academic, sports, social: content validity. Drive to be as muscular as possible, but you look in the mirror and always perceive yourself as less built.