L3 - L4 Flashcards
op def
derived via critical thinking, lit synthesis + common sense
(L2)
(Attrib of concepts become indicators and help to measure concepts)
(specifies how variables are measured with concrete meanings of them)
concept of measurement
values assigned in measuring process can be manipulated according to certion mathematical rules
(process of assigning numb/labels to observations according to certain rules)(representing quantities)
rules
guides/methods that tell re what to do (give clarity/specifity)
values
those assigned can be manipulated according to rules (concepts of measurement scales)
scale
any series of items that are arranged progressively according to value and can be placed based on quantification (series of categories)
(make scale determinging the level of measurement desirable)
index
multi item instrument used to measure a concept with several attrib
categorical variables
classify info into categories (ie gender, nom/ordinal)
nom- represent dif/disimilar attrib (exhaust possibility of the other) (Categorical)
ordinal- commonly to rate various characterisitcs (categorical)
interval- describe a variable with attrib that are rank ordered with distances (absolute dif, +/-, continuous)
ratio- with attrib that have quality of num (cont; ie yrs, height, distance)
likert scale
rank ordered, logical sequence, most to least agreem
binary scales
-nominal
-assume two possible values (yes/no)(t/f)
guttman scale
-guttman
-series of items arranged in incr order of intensity (ie least to most)
semantic differential
-multi item
-composite
-indicate opinions toward single statement with dif parts of adjectives (framed as polar opposites)
-more sensitive to att changes than dichotomous response catergories (y/n)
-ie very certain -> uncertain
-index is more than single item measures
