You are conducting an experiment in which participants are asked to focus intensely on the black star in the center of the screen. A small blue triangle is flashed for a moment in the right top corner. The failure of some of the participants to see the small blue triangle on the screen illustrates

A soldier stationed at a base in northern Alaska is dressed in his all-white camouflage

He wants to know the exact distance from which another person can distinguish him from the snowbank in which he is hiding. The soldier is concerned with the A) just noticeable difference. B) absolute threshold. C) visual processing boundary. D) limits of perceptual ability.

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."