Final answer:
The statement is true, as validity, especially external validity, is a crucial consideration when designing experimental research due to the controlled environments, manipulation of variables, and the need for careful measurement to ensure that results can be applicable to real-world settings.
Step-by-step explanation:
True. Due to controlled environments, variable manipulation, and measurement considerations, the issue of validity, especially external validity, becomes more important in developing experimental research designs. In experimental research designs, researchers aim to establish causality by controlling for external factors and manipulating the independent variable. The control group and experimental group should ideally differ only in the experimental manipulation to ensure that any observed effects can be attributable to the variable of interest. However, these controls also raise concerns about whether results from such controlled environments can be generalized to real-world settings, hence the importance of considering external validity. The purpose of experimental controls such as random assignment, adequate sample sizes, and blinding is to reduce bias and increase the reliability of the results. While these controls are essential, researchers must still critically assess the external validity of their findings to ensure that the conclusions are applicable beyond the controlled conditions of the study.