why are experiments high on internal validity?
A) the conditions can be replicated by other experimenters
B) they involve an independent as well as dependent variable
C) they involve numeric observations that can be statistically analysed
D) they are carried out inside laboratories
I am really confused between A and D.
I think it is A because the benefit of conducting a laboratory experiment is that conditions can be highly controlled. Everything apart from the Independent variable can be held constant so if changes in the independent variable are accompanied by changes in the dependent variable we can be fairly confident that it is the independent variable that caused changes in the dependent variable, rather than a confounding variable. So that means that experiments are high on internal validity
But Because they are conducted in such a controlled environment, they can be replicated. Outside the laboratory, on the other hand, it is much more difficult to create exactly the same conditions to replicate a study.
Can you please let me know the answer to this question if it is A or D please!!
The answer to the question is A) the conditions can be replicated by other experimenters.
You are correct in your reasoning. Laboratory experiments are known for their high internal validity because they allow for precise control over the conditions in which the experiment is conducted. By conducting an experiment in a laboratory setting, researchers have the ability to manipulate the independent variable and closely control other variables, holding them constant. This control helps eliminate the influence of confounding variables, making it more likely that any observed effects are indeed caused by the independent variable.
Additionally, conducting experiments in a controlled laboratory environment allows for easy replication by other experimenters. Replication is an important aspect of scientific research, as it helps verify the reliability and generalizability of findings. When an experiment can be replicated, it means that other researchers can follow the same procedures and obtain similar results, supporting the internal validity of the study.
On the other hand, option D) they are carried out inside laboratories, while true, is not the main reason why experiments have high internal validity. Conducting experiments inside laboratories is a means to achieve control over the conditions and facilitate replication, but the key factor is the ability to replicate the conditions rather than the physical location of the experiment.
Therefore, the most accurate answer to the question is A) the conditions can be replicated by other experimenters, emphasizing the importance of replication in ensuring internal validity.