Which of the following is NOT one of the three primary dimensions measured using the semantic differential method?

When a subject's response to a treatment is due to their expectations rather than the actual treatment, they are showing the _____ effect

a) placebo b) double-blind c) participant d) observer

At least 50% of adults aged 80 complete fluid and crystallized tests of intelligence and performance at rates similar to young people. This statement suggests _______

a. extensive variability within age groups b. that at least half of older adults have had increases in their IQ scores over time c. that at least half of younger adults have higher IQ scores than the older adults d. all of the above are suggested