| The study was flawed by nonrandom group assignment and testers who were not blinded to group assignment. |
| The estimates from this study are based on a small, nonrandom sample and are therefore not well suited for use in public policy analysis. |
| Rather, the R gene dictates nonrandom distribution of handedness and whorling traits only with respect to the left-right body axis. |
| Quasi-experimental designs are those in which a control group is chosen through nonrandom methods. |
| Nonetheless, under certain circumstances, nonrandom isotopic effects can become appreciable. |
| Usually, in laboratory experiments, an experimenter employs a host of manipulative interventions in an effort to guide natural processes down specific nonrandom chemical pathways. |
