Revision 1F

Question 1

Accuracy

Answer 1

how close a measurement is to the true value of the quantity
being measured.

Question 2

True value

Answer 2

the value, or range of values, that would be found if the quantity
could be measured perfectly.

Question 3

precision

Answer 3

how closely a set of measurement values agree with each other

Question 4

Systematic errors

Answer 4

errors in data that differ from the true value by a consistent amount

Question 5

Random errors

Answer 5

errors in data that are unsystematic
and occur due to chance

Question 6

Uncertainty

Answer 6

occurs when there is a high level of errors

Question 7

repeatability

Answer 7

IF THE STUDY IS REPLICATED EXACTLY, WILL THE RESULTS BE THE SAME?
the extent to which successive measurements or studies produce the same results when carried out under identical conditions within a short period of time (e.g. same
procedure, observer, instrument, instructions, and setting)

Question 8

Reproducibility

Answer 8

IF THE STUDY IS CONDUCTED UNDER DIFFERENT CONDITIONS, WOULD THE RESULTS BE THE SAME?
the extent to which successive measurements or studies produce the same results when repeated under different conditions (e.g. different participants, time, observer, and/or environmental conditions)

Question 9

Validity

Answer 9

the extent to which psychological tools and investigations truly support their findings or conclusions

Question 10

Internal validity

Answer 10

the extent to which an investigation truly measures or investigates what it claims to

Question 11

External validity

Answer 11

the extent to which the results of an investigation can be applied to similar
individuals in different settings