Published online by Cambridge University Press: 27 September 2011
It is possible to summarize our survey under the following four headings:
1. Members of different ethnic groups may react differently to comparable natural (usually complex) situations.
2. Laboratory measurements of various sensory functions of ethnic groups have often been contradictory; and even though some peripheral differences in perception are a priori probable, others may still be caused by cultural differences in cognition, memory content or motivation; these cognitive and memory differences may be best interpreted as differences in individually acquired but group characteristic reafference systems.