Skip to main content

Pupillary changes in two memory tasks


Five Ss recalled telephone numbers from long-term and short-term memory while pupil diameter was measured. Major pupillary changes were found in both tasks. Pupil diameter seems to vary with momentary load on S.


  • Cronbach, L. J., & Meehl, P. E. Construct validity in psychological tests. Psychol. Bull., 1955, 52, 281–300.

    PubMed  Article  Google Scholar 

  • Hess, E., & Polt, J. Pupil size in relation to mental activity during simple problem-solving. Science, 1964, 140, 1190–1192.

    Article  Google Scholar 

  • Hess, E. Attitude and pupil size. Scient. American, 1965, 212, 46–54.

    Article  Google Scholar 

  • Kahneman, D., & Beatty, J. Pupil diameter: A linear relationship with memory load. (Submitted).

Download references

Author information

Authors and Affiliations


Additional information

This research was supported in part by Grant NIMH No. 08847-02 to G. S. Blum. We thank Dr. I. Pollack of the Mental Health Research Institute of the University of Michigan, who provided the facilities.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Beatty, J., Kahneman, D. Pupillary changes in two memory tasks. Psychon Sci 5, 371–372 (1966).

Download citation

  • Published:

  • Issue Date:

  • DOI:


  • Telephone Number
  • Pupil Size
  • Pupil Diameter
  • Pupillary Response
  • Momentary Load