Response Process Validation Protocol using Neurophenomenological Gamma Asymmetry

  • Ronald J Bonnstetter University of Nebraska-Lincoln Target Training International
  • Eric Gehrig Target Training International
  • Dustin Hebets Target Training International
Keywords: gamma asymmetry, response process validity, industrial/organizational psychology, organizational neuroscience, sLORETA, approach-avoidance, data triangulation


In the process of designing a continuous improvement process for a set of personal attribute  self-reporting assessments, an opportunity was seen to combine assessment analytics with brain activity to capture decision-making pathways while responding to assessment items. This pilot triangulation process is designed to address response process validation, as described by The American Psychological Association to begin to better understand whether the responder is following the intended purpose of the assessment.  Method: The protocol involves collecting electroencephalographic (EEG) data, using standardized low-resolution brain electromagnetic tomography (sLORETA) to analyze and view voxel images of real-time brain activity collected while a participant responds to assessment items. This analysis examines gamma asymmetry in the frontal lobes, as well as opening the door to further wave comparisons in the future. Conclusions: The protocols used to expose the mindset of assessment responders will be shared, as well as pilot insights gained as a result of this imaging process. By collecting images from the moment of stimulus exposure to the moment that the respondent selects a likert scale answer, insights are gathered that include: how final answers compare to brain processing data, brain decision-making pathways when exposed to reverse or double negative assessment  items, exposure of brain processing when faced with socially loaded statements, resulting brain processing of neutrally scored  stimulus, and insights gained when all of this data is cross-walked against quantitative item analysis of population data such as inter-item correlations and item factor loading based on exploratory factor analysis.


Bonnstetter, B. J., Bonnstetter, R. J., Hebets, D., & Collura, T. F. (2015). U.S. Patent No. 9,060,702. Validation process for ipsative assessments. Washington, DC: U.S. Patent and Trademark Office.

Bonnstetter, R. J., Hebets, D., & Wigton, N. L. (2015). Frontal gamma asymmetry in response to soft skills stimuli: A pilot study. NeuroRegulation, 2(2), 70–85, /10.15540/nr.2.2.70

Collura, T. F., Wigton, N. L., Zalaquett, C., Chatters-Smith, S., & Bonnstetter, R. J. (2016). The value of EEG-based electromagnetic tomographic analysis in human performance and mental health. Biofeedback, 44(2), 58–65.

Collura, T. F., Zalaquett, C., & Bonnstetter, R. J. (2014). Seeing inside the client's mind. Counseling Today, 57(6), 24–27.

Collura, T. F., Zalaquett, C., Bonnstetter, R. J., & Chatters S. (2014). Towards an operational model of decision-making, emotional regulation, and mental health impact. Advances in Mind-Body Medicine, 28(4), 18–33.

Owen, W. J., Borowsky, R., & Sarty, G. E. (2004). FMRI of two measures of phonological processing in visual word recognition: Ecological validity matters. Brain and Language, 90(1–3), 40–46.

Sireci, S. G., & Sukin, T. (2013). Test Validity. In K. F. Geisinger, B. A. Bracken, J. F. Carlson, J.-I. C. Hansen, N. R. Kuncel, S. P. Reise, & M. C. Rodriguez (Eds.), APA Handbook of Testing and Assessment in Psychology, Volume 1: Test Theory and Testing and Assessment in Industrial and Organizational Psychology (Ch. 4, pp. 61–84). Washington, DC: American Psychological Association. /10.1037/14047-004

TTI Success Insights. (2018, August 21). Style Insights (Behaviors) Instrument Introduction. Retrieved from

Technical Notes