2 - Research Methods Flashcards
Confirmation bias
the predisposition to want to confirm previously held beliefs rather than wanting to test and falsify them
scientific theory
a statement that:
- is about two or more constructs
- describes causal relationships
- is general in scope
constructs
abstract and general concepts that are used in theories and that are not directly observable
e.g. “anxiety”, “evaluation of own attitudes”, etc.
independent variable
a concrete measurement or manipulation of a construct that is thought to influence other constructs
cause
dependent variable
a concrete measurement of a construct that is thought to be influenced by other constructs
effect
operationalization
- defining your variables
- making an abstract, fuzzy concept distinguishable, observable, and measurable
e. g. measure being a hockey fan on the amounth of $ spent on hockey merchandise
hypothesis
a clearly stated, falsifiable prediction based on prior knowledge
e.g. canadians will spend more money on hockey items than non-canadians
construct validity
A. definition
B. 3 related validity concepts
C. corresponding research aspect
- the extent to which the IVs and DVs used in research actually correspond to the theoretical constructs under investigation
1. IVs and DVs must correspond to the intended construct
2. they must not correspond to other constructs
convergent validity - the degree to which an operation is similar to other operations that it theoretically should also be similar to (e.g. one IQ scale and another IQ scale)
discriminant validity - the degree to which an operation is not similar to other operations that it theoretically should not be similar to (e.g. a self-esteem scale and a narcissism scale)
content validity - the extent to which a measure represents every element of a given construct, (e.g. the entire intended domain of content)
convergent validity
convergent validity - the degree to which an operation is similar to other operations that it theoretically should also be similar to (e.g. one IQ scale and another IQ scale)
discriminant validity
discriminant validity - the degree to which an operation is not similar to other operations that it theoretically should not be similar to (e.g. a self-esteem scale and a narcissism scale)
content validity
content validity - the extent to which a measure represents every element of a given construct, (e.g. the entire intended domain of content)
social desirability response bias
- people’s tendency to act in ways that they believe others find acceptable and approve of
- threat to internal, construct validity
What are some ways of ensuring construct validity?
- using the best measure types for the purpose (e.g. self-report measures, performance measures)
- using multiple measures
internal validity
- the extent to which it can be concluded that changes in the IV actually caused changes in the DV
- depends mostly on the research design of the study
- ensuring internal validity
**experimental research **
random assignment
corresponding research aspect - design
ensuring internal validity
- experimental research - a research design in which researchers randomly assign participants to different groups and manipulate one or more IVs
- random assignment - procedure of assigning participants to different experimental groups so that every participant has exactly the same chance as every other participant of being in any given group