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0 Exakte Antworten 33 Text Antworten 10 Multiple Choice Antworten
Fenster schliessen

What is objectivity?

Results are independent of examiner

Fenster schliessen

What is reliability?

- consistent results, if measurements are repeated

- free from random error (but not free from systematic error)

Fenster schliessen

What is validity?

Whether what was tryed to measure was really measured.

Fenster schliessen

A measurement that is objective, cannot be reliable.

true

false

Fenster schliessen

A measurement that is not objective, cannot be reliable.

true

false

Fenster schliessen

A non reliable measurement lacks validity

true

false

Fenster schliessen

A non reliable measurement does not lack validity

true

false

Fenster schliessen

What is sampling? Name techniques.

Process of selecting test units

  • Non Probability sampling

    • Convenience samples: samples drawn at the convenience of the interviewer

    • Judgmental samples: requires a judgment or an “educated guess” as to who should represent the population

    • Quota samples: specified percentages of the total sample for various types of individuals to be interviewed

    • Snowball samples: require respondents to provide the names of prospective respondents

  • Probability Sampling (

    • Simple random sampling: the probability of being selected into the sample is “known” and equal for all members of the population.

    • Systematic sampling: way to select a random sample from a directory or list that is much more efficient than simple random sampling

    • Stratified sampling: separates the population into different subgroups and then samples all of these subgroups

    • Cluster sampling: method in which the population is divided into subgroups, called “clusters,” each of which could represent the entire population