Summary.An investigation of a group of fourth‐year junior children confirmed that some of them have difficulty in reading and understanding a number of items of the Junior Eysenck Personality Inventory. The findings were that a Reading Age in the region of 8 to 8 1/2 years is probably necessary for reading the inventory, that duller children tend to understand fewer items than brighter children, and that some items are more frequently misunderstood than others. A second investigation failed to support the hypothesis that difficulties in reading and comprehension are associated with differences between the mean scores of dull and average boys on the Extraversion, Neuroticism and Lie Scale