childâs arm to give medicine for the test. What happens during the scan? 1. The first medicine, called radioisotope, is given. Your child will need to lie still during the scan. It normally takes 30 minutes. After this scan, the images will be checked to make sure all the areas can be seen. 2. The CCK is given over 30 minutes.
Digit span testing is a measure of memory span which is the number of items, usually words or numbers, that a person can retain and recall. Where numbers are used it is also known as digit span, and the test is called digit repetition.
Mental chronometry is studied using the measurements of reaction time (RT). Reaction time is the elapsed time between the presentation of a sensory stimulus and the subsequent behavioral response. In psychometric psychology it is considered to be an index of speed of processing. That is, it indicates how fast the thinker can execute the mental operations needed by the task at hand. In turn, speed of processing is considered an index of processing efficiency.