Assesses the concentration performance.
These abilities have a major influence on an individual’s performance in both everyday and challenging activities. Because of its significant practical relevance, this test is used in clinical neuropsychology, safety assessments and investigations in the fields of traffic psychology and sports psychology.

Respondents compare a geometric figure with other geometric figures. They then state whether the comparison figure is identical to one of the other four geometric figures. In the test forms with free working time respondents press different keys to indicate whether the figure is identical with another one or not. In the test forms with fixed working time respondents have a short time window in which to react only if a figure is identical to the comparison figure.

S1: Parallel form 1 with free working time
S2: Parallel form 2 with free working time
S3: Parallel form 3 with free working time
S4: Parallel form 1 with fixed presentation time per item
S5: Parallel form 2 with fixed presentation time per item
S8: Parallel form A with fixed time limit
S9: Parallel form B with fixed time limit
S11: Short form with flexible working time

The following main variables are scored, depending on the test form:

• S1, S2, S3, S11
  • Mean time “Correct rejection”: measure of speed during concentrated working.
• S4, S5
  • Total “correct reactions”: measure of working accuracy during concentrated working.
  • Total “incorrect reactions”: measure of working accuracy during concentrated working.
• S8, S9
  • Total “reactions” (correct and incorrect reactions): measure of processing speed.
  • Percentage of “incorrect reactions”: measure of working accuracy.