Variables
Something that never changes - like pi (3.14 ) or temperature at freezing (32 degrees F).
What is a constant?
Gender (Male, Female, Transgender, Nonbinary).
What is a nominal variable?
Considered a non-probability sampling technique, you select people who are easy to find.
What is convenience sampling (or self-selection sampling)?
The degree of consistency or precision that a measurement instrument provides.
What is reliability?
Determines if an instrument accurately measures what it is supposed to.
What is validity?
Defining a concept in clear, measurable terms
What is operationalize?
Each person in the population has an equal chance at being selected.
What is simple random sampling?
Administering the same instrument multiple times to the same group of individuals.
What is the test-retest method?
Asks if the instrument captures the construct it intends to measure
What is construct validity?
Different categories of a variable you can select.
What are attributes?
Age
What is a ratio variable?
People are selected based on the researcher's judgment.
What is purposive sampling?
Administering equivalent forms of an instrument to the same group of people.
What is the alternate-forms method?
Asks if the instrument adequately measures the major dimensions of the variable selected
What is content validity?
An operational definition is a process by which a researcher defines how a variable is ___________ and ______________.
What are observed and measured?
-32 Degrees Farenheit
What is an interval variable?
Commonly used with hard-to-reach populations, an existing participant is identified and then asked to recruit others they know.
What is snowball sampling?
Splitting an instrument in half and administering both halves to a group of people. Compare the scores to determine the reliability of an instrument.
Asks if the instrument appears to measure what it intends to measure
What is face validity?
This is the active variable in the study, said to cause or predict a proposed behavior.
Primary school, high school/GED, college diploma, graduate school.
What is an ordinal variable?
The population is divided into smaller groups of representative characteristics (ex: race, gender, education level, etc.) A random sample from each group, or strata, is then selected.
What is stratified random sampling?
The statistical calculation used to determine good test-retest reliability
What is the reliability coefficient?
Asks if the measure can predict probable behavior on a second, external but comparable criterion
What is criterion validity?