Respondents see nine irregularly arranged cubes. They watch a cursor that touches a certain number of cubes in turn. At the end of this sequence a signal sounds; the respondent must now repeat the given sequence either forwards or backwards, depending on the test form. The length of the sequence increases after every third item until the maximum of eight cubes is reached.
To test learning in spatial working memory, in two test forms (S3/S4) the spatial memory span is first identified. On the basis of this a target sequence is defined that is one longer than the memory span previously achieved.