In a study of liver transplant recipients, the researcher ...

[cdr_15]

In a study of liver transplant recipients, the researcher specifies that the subjects must be 18 years of age or older and the recipient of only one liver transplant. These criteria are an example of:
 
  a. demographic attributes.
  b. exclusion criteria.
  c. extraneous variables.
  d. inclusion criteria.

Question 2

The population from which the researcher selects the actual study sample is referred to as the:
 
  a. accessible population.
  b. scientific population.
  c. target population.
  d. theoretical population.

[ciecieme]

Answer to Question 1

ANS: D
Inclusion criteria are those characteristics that the subject or element must possess to be part of the target population.
Demographic attributes are things about the sample that the researcher describes in the report about the sample.
Exclusion criteria are characteristics that the researcher does not want in the elements or subjects of the study.
Identification of characteristics and a homogeneous group would eliminate a characteristic as a variable of any kind. If the characteristic is controlled, it is not an extraneous variable.

Answer to Question 2

ANS: A
An accessible population is the portion of the target population to which the researcher has reasonable access. The sample is obtained from the accessible population.
A scientific population is not a correct term.
The target population is the entire set of individuals who meet the sampling criteria.
Theoretical population is the same as a target population, which is the entire set of individuals who meet the sampling criteria.