Bias, errors, and other sad things Flashcards
1
Q
what are the two main types of errors?
A
- random errors or chance: 2-tailed presentation of errors
2. Systematic Errors (Bias):- 1-tailed presentation of errors (usually)
2
Q
describe confounding bias
A
- two factors are associated (packaged, mated) and the effect of one
distorts or is interpreted as the effect of the other
3
Q
how can a researcher attempt to reduce confounding factors?
A
Matching
- According to known or suspected confounders to ensure equal distributions
of confounders in each study group
or
Restriction
- Restrict study or case admission criteria to prohibit variation of known or
suspected confounder in study groups
or
Randomization
- Ensure equal distribution of confounding variables in each study group