Abstract
A questionnaire survey to the guardians registered at a 3601-student nursery school between 2002 and 2003 was conducted.
According to the 1st investigations, the result of the ratio of the in-the-womb memory possessed by the guardian and the kindergartner were 1.1% and 33.0%, respectively.
The results were compared to those of 12 other similar investigations.
The 12 investigations consisted of questionnaires which were distributed at 5 lectures, 4 internet sites and 3 student, mother groups.
The comparison could not be identical since these investigations varied in method and target population.
The rate of the reported in-the-womb memory possession was 12.2 to 69.3% (mostly 20%) for ages up to 6, 4.1 to 9.0% for primary school ages, 0 to 3.4% for junior high school ages, 3.0% for high school ages and 0.6% for adult ages.
Future investigation based on more consistent methods will be necessary to firmly established the above results.
