The D2 Test of Attention: An Examination of Age, Gender, and Cross-cultural Indices
The d2 Test of Attention (d2 test) is an internationally used instrument to assess both selective and sustained attention in a variety of clinical settings. The d2 Test is a reliable and valid measure of attention based on German and preliminary United States normative samples. The purpose of this study is to provide normative data obtained from a sample of 302 healthy adults between 30 and 89 years of age that is representative of the U.S. population. In addition, age, gender, and cross-cultural influences will be examined. Results indicate that a dramatic decline in attention and concentration appear by the fifth decade, further declining by the seventh decade. Gender and education did not impact performance of the d2 Test. Cultural differences were not found between US and German adult samples. Normative data is provided based on the U.S. sample of the current study.
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