Term
|
Definition
1. Data collection
a. Observecr error
b. Misspecification of codebook
c. Instrument error
d. Self-reporting error
e. Recording errors
f. Entry errors. |
|
|
Term
|
Definition
1. Error due to person
2. Error in measurement tool
a) Scales
b) Questionnaires
c) Laboratory assays
3. Error due to observer
4. Error in recording measurement |
|
|
Term
|
Definition
Error components:
MEASURED VALUE
(True value + Error)
ERROR
(Bias + Random Error) |
|
|
Term
Measurement Error Model
Bias - Lack of validity - Systematic error |
|
Definition
| Systematic difference between the tru & measured value |
|
|
Term
|
Definition
Lack of reliability - Lack of precision - Lack of repeatability
Difference between values of repeated measurements
irrespective of whether the measured value is the tru value |
|
|
Term
MEASURING BIAS:
Assessing Validity |
|
Definition
DISCRETE VARIABLES CONTINUOUS VARIABLES
+ Sensitivity +Correlation (r)
+ Specificity + Regression |
|
|
