Jan Has Developed a Software Package to Measure Intelligence Through

Multiple Choice

Jan has developed a software package to measure intelligence through images rather than verbal skills. Initial testing shows that when the same volunteers took the test multiple times, their scores would vary by up to 40%. It is difficult to know which score to believe. Therefore, Jan knew he had to work on improving the test's _____.

A) standardization
B) norms
C) reliability
D) mental age