Which of the following is accurate? a) threats to external validity are decreased by carefully controlling conditions b) threats to internal validity are increased by carefully controlling conditions c) threats to external validity of research findings in experiments are unrelated to internal validity d) threats to external validity are increased by carefully controlling conditions.

a). threats to external validity are decreased by carefully controlling conditions                                                  

Explanation:

Validity in a research work represents whether the conclusion or the results of the study correct and meaningful. External validity may be defined as how the findings of the research are applicable to the real world.

It is the validity of  relating the results of a scientific study outside the conditions of that particular study.

There are seven important factors that affects the external validity. They are :

1. time effect

2. effects of the experimenter

3. research environment effect

4. subjects

5. Descriptive explicitness

6. Interaction between research and subject

7. Method of data collection

By controlling these conditions, the threat to external validity can be decreased.

Hence the answer is

a). threats to external validity are decreased by carefully controlling conditions