The relative impact of attitudes toward autism spectrum disorders and the ability to interpret scientific information on vaccination decisions

Background: Of all the childhood vaccines, the measles-mumps-rubella (MMR) vaccination has a uniquely controversial history. The present study aimed to investigate whether attitudes to autism spectrum disorders (ASD) and the ability to appropriately interpret scientific information impacts parental decisions regarding vaccination. Method: A sample of 132 parents and expectant parents (mean age 38.40 years; > 60% with university education) participated in a survey related to attitudes toward and knowledge about the MMR and ASD, and completed a standardized test of science (The American College Test). Results: Knowledge of ASD was related to attitudes towards ASD while attitudes towards ASD were related to scientific literacy and attitudes towards MMR. Only attitudes towards MMR predicted MMR vaccine status (i.e., vaccination decision). Conclusion: Factors other than scientific literacy seem to contribute towards MMR vaccine status.