The answer is many different types of items
<u>Answer</u>:
Instrumentation
<u>Explanation</u>:
Instrumentation internal validity threat:
<u><em>There are seven instruments internal threat are as follows:
</em></u>
<u>Instrumentation</u>: It is very important for research that the instrument used for the research should be accurate in their measurement because its accuracy will be responsible for the outcomes of the study.
Answer:
huh?? what does that mean?
