The Digit Symbol Substitution Test (DSST) was initially developed as an experimental tool over a century ago by researchers seeking to understand human associative learning. It is neuropsychological test sensitive to brain damage, dementia, age and depression.

The Sustained Attention to Response Task (SART) is a cognitive task designed to measure sustained attention, working memory, and response inhibition. It is a continuous performance task (CPT) which involves a motor response to frequent stimuli and a withheld motor response to a rare stimulus.

The Stroop phenomenon demonstrates that it is difficult to name the text color of a color word if there is a mismatch between text color and word. For example, the word GREEN printed in the color red. The Stroop test is a classic test of cognitive control and is used in clinical and research settings. It is a demonstration of interference in the reaction time of a task.