CHAPTER 3- ADV. ACCESS FOR STATISTICS FOR EBP

Question 1

A variable that can be counted and has a finite and fixed number of possible values (i.e., every value is assigned to a particular group or category); variables measured at the nominal and ordinal level.

Answer 1

CATEGORICAL VARIABLES

Question 2

Any uncontrolled variable that may influence the outcome of a study.

Answer 2

CONFOUNDING VARIABLE

Question 3

An idea or concept of interest.

Answer 3

CONSTRUCT

Question 4

The degree to which an instrument or tool measures the specific idea of interest.

Answer 4

CONSTRUCT VALIDITY

Question 5

The degree to which a measurement tool captures the elements of the concept of interest.

Answer 5

CONTENT VALIDITY

Question 6

A variable that has an infinite number of possible values or the infinite number of values between two consecutive values; variables measured at the interval and ratio level.

Answer 6

CONTINUOUS VARIABLE

Question 7

The degree to which measurements from one tool or instrument may be correlated with measurements from other valid and reliable instruments.

Answer 7

CRITERION-RELATED VALIDITY

Question 8

The values of variables.

Answer 8

DATA

Question 9

A collection of data.

Answer 9

DATA SET

Question 10

An outcome variable that is affected or influenced by the independent variable.

Answer 10

DEPENDENT VARIABLE

Question 11

Also known as categorical variable; a variable that can be counted, but has a finite number of countable categories; variables measured at the nominal and ordinal level of measurement.

Answer 11

DISCRETE VARIABLE

Question 12

The validity of a study based on whether or not its results can be generalized from the sample to the target population.

Answer 12

EXTERNAL VALIDITY

Question 13

The program files variable that influences another variable(s). Also the variable that the investigator controls or manipulates to affect the dependent variable.

Answer 13

INDEPENDENT VARIABLE

Question 14

A measure of whether or not items in the same test, which purport to measure the same variable, are related.

Answer 14

INTERNAL CONSISTENCY

Question 15

The degree to which changes on the dependent variable may be attributed to the independent variable. Strongly influenced by the quality of the study and control of confounding variables.

Answer 15

INTERNAL VALIDITY

Question 16

The ability of a test or scale to provide consistent values when used by different people.

Answer 16

INTERRATER RELIABILITY

Question 17

The four different scales of measurement, used to differentiate types of data. They are nominal, ordinal, interval, and ratio.

Answer 17

LEVELS OF MEASUREMENT

Question 18

The difference between the true value of variable and the value that has been measured.

Answer 18

MEASUREMENT ERROR

Question 19

Variables whose data values are nonnumeric.

Answer 19

QUALITATIVE VARIABLE

Question 20

Variables whose data values are numeric.

Answer 20

QUANTITATIVE VARIABLE

Question 21

The measure of whether or not a test is able to consistently measure a given variable.

Answer 21

REALIABILITY

Question 22

The measure of a test’s ability to consistently provide the same measurements across time.

Answer 22

TEST-RETEST RELIABILITY

Question 23

A device for measuring variables.

Answer 23

TOOL/INSTRUMENT

Question 24

The extent to which a test measures the variable it is designed to measure.

Answer 24

VALIDITY

Question 25

A trait or characteristic whose value is not fixed and can change (either from subject to subject, or within the same subject over time).

Answer 25

VARIABLE

Question 26

Transforming a variable’s level of measurement from a higher level to a lower level always results in

Answer 26

LOSS OF INFORMATION

Question 27

Scientists are studying the effects of a drug on cancer. Which would be considered an independent variable in the study?

Answer 27

TIMING OF THE DOSES

*Effect of the drug on cancer and side effects of the drugs are DEPENDENT VARIABLES.

Question 28

Which statement accurately described measurement error in research?

Answer 28

Measurement error is universal

Question 29

Variables with constant values are considered data.

Answer 29

TRUE

Question 30

Which is the highest complexity level of measurement?

Answer 30

RATIO

Question 31

The coefficient used to measure reliability of interval or ratio measurements is

Answer 31

CRONBACH’S ALPHA

Question 32

A study that can be used to make accurate inferences about its sample population can be said to have high external validity.

Answer 32

TRUE

Question 33

An example of an interval level of measurement.

Answer 33

TEMPERATURE