Flashcards in 4.1 Validity Deck (32)
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____ validity concerns whether our methods of studying variables are accurate.
Construct
1
____ validity refers to the accuracy of conclusions about cause and effect.
Internal
2
____ validity concerns whether we can generalise the findings of a study to other settings.
External
3
A ____ is any event, situation, behaviour, or individual characteristic that varies.
variable
4
Any variable must have ___ or more levels or values.
two
5
For some variables, the values will have a true numeric, or ____, properties.
quantitative
6
The values of other variables are not numeric, but instead simply identify different ____.
categories
7
The ____ definition of a variable is the set of procedures used to measure or manipulate it.
operational
8
A variable must have an operational definition to be studied ____.
empirically
9
The task of developing an operational definition of a variable forces scientists to discuss ____ ____ in concrete terms.
abstract concepts
10
Operational definitions also help researchers to ____ their ideas with others.
communicate
11
____ validity refers to the adequacy of the operational definition of variables: Does the operational definition of a variable actually reflect the true theoretical meaning of the variable?
Construct
12
Many research studies investigate the ____ between two variables: Do the levels of the two variables vary systematically together?
relationship
13
In a ____ ____ relationship, increases in the values of one variable are accompanied by increases in the values of the second variable.
positive linear
14
In a ____ ____ relationship, increases in the values of one variable are accompanied by decreases in the values of the other variable.
negative linear
15
In a ____ relationship, increases in the values of one variable are accompanied by systematic increases and decreases in the values of the other variable.
curvilinear
16
When there is __ relationship between the two variables, the graph is simply a flat line.
no relationship
17
A numerical index of the strength of a relationship between variables is called a ____ ____.
correlation coefficient
18
Correlation coefficients are very important because we need to know how strongly variables are ____ to one another.
related
19
The term ____ implies that there is randomness in events; scientists refer to this as random variability in events that occurred.
uncertainty
20
Research is aimed at reducing ____ ____ by identifying systematic relationships between variables.
random variability
21
In an experiment, the manipulated variable is the ____ ____.
independent variable
22
After manipulating the independent variable, the researchers measure a second variable, called the ____ ____.
dependent variable
23
The variable that is considered to be the ____ is called the independent variable and the variable that is the ____ is called the dependent variable.
cause, effect
24
When the relationship between an independent and a dependent variable is plotted in a graph, the independent variable is always placed on the ____ axis and the dependent variable is always placed on the ____ axis.
horizontal, vertical
25
____ validity is the ability to draw conclusions about causal relationships from the results of study.
Internal
26
A study has high internal validity when strong ____ can be made that one variable caused changes in the other variable.
inferences
27
Internal validity one. There must be ____ precedence.
temporal
28
Internal validity two. There must be ____ between the two variables
covariation
29
