lecture 2 Flashcards
what is a conceptual variable
something abstract and broad (like “memory”)
what is operationalizing a variable
picking a specific way to look at your variable
- ex; instead of memory, we look specifically at free recall
frequency claims
describe a level/degree of a single variable and involve one measured variable
association variable
says one level of a variable is likely to be associated w a level of another variable
supported by studies with 2 variables
causal claims
argues one variable changes in the level of another variable
supported by experiments
can a “zero association” help us make predictions?
no
what are the 3 common types of measures
self report
observational
physiological
list n explain scales of measurement + the types
categorical:
- categorical (lvls are categories)
- quantitative (lvls are meaningful nmbrs)
- ordinal (fixed order for how the data is presented)
quantitative:
- ordinal scale (order, and dont know if distance between each variable is same)
- interval scale (numbers, and each lvl has same distance between them)
what r 3 types of reliability
test retest
interrater
internal
test retest reliability
consistent scores every time the measure is used
interrater reliability
consistent scores regardless of who does the measuring
internal reliability
participant provides consistent pattern of responses, regardless of how researcher has phrased question
what is average inter item correlation (AIC)?
the average of all correlations between diff items
face validity
looks like what you want it to measure?
content validity
measure contains all parts that your theory says it should contain
