The three essential elements of experimental research are (1) randomization; (2) researcher-controlled manipulation of the independent variable; and (3) researcher control of the experimental situation, including a control or comparison group. Groove et al. 10381-10382 (2013). This study incorporates those three criteria. The study also incorporates a Longitudinal process. Grove, Burns & Gray (2013) state “Longitudinal …show more content…
In addition to your assigned article you will need to use your textbooks or other resources to adequately talk about the specific aspects of having validity in a research study.
Validity is affected by low statistical power. As stated above, a power analysis was unable to be conducted for this study. Grove, Burns & Gray (2016) state:
Low statistical power increases the probability of concluding that there is no significant difference between samples when actually there is a difference (Type II error, failing to reject a false null) (see Chapter 8 for discussion of the null hypothesis) (Groove and Cipher,