Final answer:
The correct option is c) Validated and standardized.
Modern intelligence tests like WAIS, WISC, and Stanford-Binet are considered more accurate because they have been validated and standardized, a process not usually applied to online intelligence tests.
Step-by-step explanation:
Scores from modern intelligence tests such as the WAIS, WISC, and Stanford-Binet are more accurate than scores from intelligence tests found on the internet because they have been validated and standardized. These tests have undergone rigorous scientific processes including peer review, extensive research, and continuous updates to ensure they measure what they intend to measure - the construct of intelligence.
The WISC-V, for instance, consists of 14 subtests addressing different cognitive abilities, which holistically contribute to the derivation of an individual's IQ score. Moreover, this standardization involves testing a diverse and representative sample population to create a bell curve for scoring purposes. In contrast, the validity and reliability of online tests are usually not established, making their results less accurate and reflective of an individual's true cognitive abilities.