Performance on a putative psychophysical measure of information processing related to intelligence (Vickers' 1995 Frequency Accrual Speed Test, FAST) was assessed in relation to two psychometric measures of intelligence (Raven's Advanced Progressive Matrices and the Mill Hill vocabulary test). Participants (N = 57) completed the Eysenck Personality Questionnaire — Revised (EPQ-R), and performed the FAST task under either low (70 dB) or high (90 dB) levels of white noise. FAST correlated with Raven's (r = 0.56) and Mill Hill (r = 0.28), as expected. FAST total scores were not affected by personality or personality-by-noise interactions. However, a measure of consistency of FAST performance (i.e. the standard deviation) was correlated negatively with total FAST scores (r = −0.37) and positively with (EPQ-R) extraversion (r = 0.34). The results are discussed in terms of the validity of the FAST to explicate the information processing variables in psychometric intelligence.