Post by noormehak on Sept 14, 2017 2:55:32 GMT
To have a bathroom scale that was extremely reliable but not valid would mean that you would get an inaccurate number on the scale over and over (over time). The number may not be exactly the same each time, but would be similar. Reliability refers to the similarity of the scale each time it is used to measure the same individual. Validity refers to the scale measuring what it is supposed to, in this case the accurate weight.
No, can’t have a scale that is valid but not reliable. For the scale to be valid, it means that it would have to show the accurate weight and for it to be reliable means that the same weight would appear every time. The scale would have to be reliable, if it is valid because if the same number is not the result each time, then the scale is not only unreliable but also not valid.
An experiment may result in repeated and accurate results, referring to reliability and good internal validity. However, this may not reflect the outside world, external validity. For example, in the laboratory many variables are controlled, however outside of the laboratory this is not the case. Internal validity is focused on looking at the relationship between the independent variable (manipulating it )and its effects on the dependent variable. External validity is focused on generalizing the results to the outside world. For example, can the results of a study still be effective when other variables cannot be controlled or to other individuals.
Interviews and surveys could be reliable but not always valid. An individual can have the same response when taking a survey a number of times or responding to an interview question. However, this answer may not be the accurate answer, thus making the response reliable but not valid. Also, the responses may have good internal validity but not external due to other factors present outside of the interview or survey environment that affect one’s response and behaviour.
No, can’t have a scale that is valid but not reliable. For the scale to be valid, it means that it would have to show the accurate weight and for it to be reliable means that the same weight would appear every time. The scale would have to be reliable, if it is valid because if the same number is not the result each time, then the scale is not only unreliable but also not valid.
An experiment may result in repeated and accurate results, referring to reliability and good internal validity. However, this may not reflect the outside world, external validity. For example, in the laboratory many variables are controlled, however outside of the laboratory this is not the case. Internal validity is focused on looking at the relationship between the independent variable (manipulating it )and its effects on the dependent variable. External validity is focused on generalizing the results to the outside world. For example, can the results of a study still be effective when other variables cannot be controlled or to other individuals.
Interviews and surveys could be reliable but not always valid. An individual can have the same response when taking a survey a number of times or responding to an interview question. However, this answer may not be the accurate answer, thus making the response reliable but not valid. Also, the responses may have good internal validity but not external due to other factors present outside of the interview or survey environment that affect one’s response and behaviour.