POLI 311 Lecture 12: lecture 12
2 Apr 2016
School
Department
Course
Professor
Document Summary
Measurement error: diferences in the values assigned to our observaions, atributable to laws in the measurement process. Systemaic errors: occur when our indicator is picking up some other property in addiion to the property that it is supposed to measure. This type of error systemaically biases our results. Random errors: chance luctuaions in measurement that do not relect the true values in the property being measured. These errors occur as a mater of chance and afect each observaion diferently. A measure can be invalid and reliable but cannot be valid if it is unreliable. Can knowledgeable people be convinced that the measure is an appropriate indicator of the target indicator: potenial problems: it"s a subjecive judgement and there are no replicable rules for evaluaing the measure. Sampling validity does measure represent the full range of meaning of the target concept: potenial problems: No replicable rules for evaluaing the measure. Diicult to specify the universe of the content of abstract concepts.
