Post by Ahmad on Sept 15, 2017 3:50:34 GMT
In the bathroom scale case, the start point starts from 15.5 rather than starting from 0. Thus a person can use it every time and get the same weight (reliability). Nevertheless it is not valid because it is giving you the wrong weight reading.
In my opinion I think that in order for the scale to be reliable, it needs to be valid.
Moghaddam sets the laboratory setting with good statistical tools, operational definitions and thus we could agree that it can be valid. Regarding his internal reliability, I think that in laboratory setting, the experiment will work efficiently, whereas, the experiment could lack external validity as we cannot generalize the experiment as rats act differently in outer environment.
In my opinion it’s going to be difficult to have a survey with high validity and reliability. For instance, a guy might take the survey just for fun and not even reveal what he feels or thinks, etc. Therefore, we cannot consider his answers valid. If it’s not valid then probably its reliability is going to be poor.
In my opinion I think that in order for the scale to be reliable, it needs to be valid.
Moghaddam sets the laboratory setting with good statistical tools, operational definitions and thus we could agree that it can be valid. Regarding his internal reliability, I think that in laboratory setting, the experiment will work efficiently, whereas, the experiment could lack external validity as we cannot generalize the experiment as rats act differently in outer environment.
In my opinion it’s going to be difficult to have a survey with high validity and reliability. For instance, a guy might take the survey just for fun and not even reveal what he feels or thinks, etc. Therefore, we cannot consider his answers valid. If it’s not valid then probably its reliability is going to be poor.