Final answer:
The question is asking to identify the term that reflects the relationship between a selection procedure and a psychological trait, which is 'validity'. Validity is concerned with how accurately a measure reflects the concept it is intended to assess, and it is established through empirical evidence and hypothesis testing.
Step-by-step explanation:
Requires demonstrating that a relationship exists between a selection procedure and a psychological trait or measure indicates the necessity to establish validity. When we talk about validity in the context of psychological measurements, we refer to the accuracy of the result in measuring what it is designed to measure. This involves hypothesis testing where the null hypothesis commonly posits that there is no relationship or effect, and researchers must provide evidence to the contrary.
The process includes setting up controlled experiments or observations and using statistical analysis to determine if there is a significant correlation or causal relationship. To be ethically and methodologically sound, such testing relies on empirical evidence collected in a manner that is scientifically rigorous and ethically responsible.
Moreover, such experiments must fully consider ethical constraints, particularly when dealing with psychological variables or traits. Ultimately, psychologists aim to establish that any significant differences in findings are not due to chance but rather due to the factor being measured or manipulated, thus asserting the validity of the selection procedure.