A comparison has been made between the traffic offences committed by 400 young males aged 17 to 21 years, with intelligence quotients (IQ) of 100 or above, and a similarly selected group of equal numbers and ages but with an IQ of 90 or below. An analysis was made of the "number of persons" in each of the two groups who committed various types of offences. A further analysis was made of the "number of offences" of different varieties for which those in each of the groups were convicted. Significantly more persons in the "lower intelligence group" were convicted of traffic offences than were those in the "higher intelligence group". The difference was found to be accounted for by an excess of repeat offenders, the number of first offenders being almost the same in the two groups. It is important to note that more persons in the "lower intelligence group" were convicted of serious traffic offences. The number of non-serious offenders was the same in both groups. The "lower intelligence group" had significantly more total offences, more car faults, illegal driving, speeding and alcohol offences than the "higher intelligence group". There were no great differences in the driving fault and driving manner offences. Possible explanations of these results are offered. Among them the activities of the police and the classifications of driving offences are examined. Evidence is given that by dividing the offences into "moving" and "non-moving", the differences observed between the two groups can be accounted for by the preponderance of the "non-moving" offences in the "lower intelligence group". These may be largely explained by illiteracy, difficulties in communication and the behaviour and appearance of the offenders. /Author/


  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 3-19
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00262711
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS, ATRI
  • Created Date: Jan 9 1975 12:00AM