If we know that a sample of scores is normally distributed, we can use z-scores in the same way we use t tests, if the sample mean has been transformed.

What evidence suggested to Alan Baddeley that working memory has several components?

a. the research on release from proactive interference b. complex computer simulations c. modeling using the parallel distributed processing approach d. research showing that people can rehearse words and make spatial judgments at the same time

A psychologist just administered the WAIS-IV to a 23-year-old recruit for the Marine Corps. The recruit obtained an overall IQ of 130. Which statement might be found in the written report of this test administration?

a) "This man obtained an IQ that is slightly above average." b) "There seems to be evidence of savant syndrome in this testing." c) "This IQ score places this man in the mild mental retardation range." d) "The obtained IQ exceeds the scores obtained by the majority of the population."