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Measurements & Eval test 1
Terms in this set (20)
The process of assigning a value (number or quality) to a characteristic being measured
The process in which all available data is combined to make an informed decision
standard (true or false question)
opinion based (discussion question)
the presidential physical fitness test
average of the class on the fitness test
limited number of choices (male or female, no other option)
height, temperature (things that can continuously get hotter or colder, someone getting taller)
quiz or chapter test, every single grade
comprehensive final exam or final grade
Underlying qualities that make up the performance or behavior being measured; it is difficult to accurately measure underlying constructs that represent a successful behavior change.
Uses data that can be quantified so that it can be analyzed statistically
Uses detailed descriptions, observations, and interviews to try to understand the processes that underlie various behaviors
Classification of Measurement Errors
Validity, reliability, objectivity
The degree to which a measurement measures what it is supposed to measure, with acceptable error.
Valid X = T + acceptable E
where X is the measurement, T is the true score, and E is the error
Must be acceptably accurate and also interpreted and applied accurately.
-Knowing what is "acceptable" depends on what is being measured.
Dependability, consistency, or repeatability; a measurement can be repeated over and over, with similar results each time.
Reliable X = T ± consistent E
•If a measurement is truly valid, it must also be reliable.
Possible Factors Affecting Reliability
Fatigue, Improvements in skill, Environmental changes
Defined: Reliability between different raters or judges; the degree to which a measurement is free from bias.
characteristic being measured-trying to explain a phenomenon. Ex. What are the constructs of being a good student: attendance, work completion, study, preparation, time management
measure who's accuracy is considered acceptable; close enough to measuring what it needs to measure
content validity vs
face validity" ex. creates questionnaire & ask friends if it makes sense
real world situation ex. If u want someone's free throw ability line them up and see how many they can hit out of 10 vs being in a game and having outside factors (crowds)
generalize results outside of the people we tested
average set of numbers in a distribution Ex/n
-Ex= sum of all the numbers
-n=number of pieces in data
middle number in set of distribution (rank them highest to lowest or vis versa)
Most common number; occurs the most
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