To evaluate a person for possible brain damage,a neuropsychologist gives the person a visual memory test and a reading test.To compare the person's performance across these two tests,what should the neuropsychologist do?
A)Graph the raw score distribution for each test on the same graph.
B)Calculate a z-score for each test.
C)Calculate z-scores for the sample means.
D)Find the simple frequency of the person's raw score for each test.

Question

Quizplus · Accepted Answer

The best choice is to calculate a z-score for each test because this allows for comparison of performance on two different tests with potentially different scoring scales. By standardizing each person's score based on the mean and standard deviation of their respective sample population, it becomes easier to compare their performance relative to their peers. Graphing the raw score distribution on the same graph may be useful in visualizing the distribution of scores, but it does not allow for direct comparison of performance on the two different tests. Calculating z-scores for the sample means would not be relevant for evaluating an individual's performance, and finding the simple frequency of the person's raw score does not provide a way to compare their performance relative to the larger population.

To Evaluate a Person for Possible Brain Damage,a Neuropsychologist Gives