| 1. | Using unequal groups can also be a threat to internal validity.
|
| 2. | However, in doing so, you sacrifice internal validity.
|
| 3. | Statistical regression, history and the participants are all possible threats to internal validity.
|
| 4. | The apparent contradiction of internal validity and external validity is, however, only superficial.
|
| 5. | Internal validity is the approximate truth about inferences regarding cause-effect or causal relationships.
|
| 6. | Internal validity is highly important to testing scientific theories because such theories are usually about causality.
|
| 7. | In other words, descriptive research can be said to have a low requirement for internal validity.
|
| 8. | Internal validity refers to the extent to which a set of research findings provides compelling information about causality.
|
| 9. | These compare control samples to participant samples, which may provide internal validity, but not external validity.
|
| 10. | The participants had to have no other health problems allowing for the experiment to have accurate internal validity.
|
