Serial Sevens (Serial Threes) Task

FREE for use with an Inquisit Lab or Inquisit Web license.

Available Test Forms

Serial Sevens (Serial Threes) Task

The Serial Sevens and Serial Threes Tasks by Kennedy & Scholey (2000), measuring cognitive effort/load by having participants count backwards by sevens or threes.
Duration: 5 minutes
(Requires Inquisit Lab)
(Run with Inquisit Web)
Last Updated


Google ScholarSearch Google Scholar for peer-reviewed, published research using the Inquisit Serial Sevens (Serial Threes) Task.

Kennedy, D.O. & · Andrew B. Scholey, A.B. (2000). Glucose administration, heart rate and cognitive performance: effects of increasing mental effort. Psychopharmacology (2000) 149:63–71.

Srygley, Mirelman, Herman, Giladi, & Hausdorff. (2009). When does walking alter thinking? Age and task associated findings. Brain Research, 1253, 92-99.

Margaret Anne Defeyter, & Riccardo Russo. (2013). The effect of breakfast cereal consumption on adolescents’ cognitive performance and mood. Frontiers in Human Neuroscience, 7(NA), NA.

Kannape, O., Barré, A., Aminian, K., & Blanke, O. (2014). Cognitive Loading Affects Motor Awareness and Movement Kinematics but Not Locomotor Trajectories during Goal-Directed Walking in a Virtual Reality Environment. PLoS One, 9(1), E85560.

Kim, Needle, Thomas, Higginson, Kaminski, & Swanik. (2016). A sex comparison of reactive knee stiffness regulation strategies under cognitive loads. Clinical Biomechanics, 35, 86-92.