Duke-Heidelburg quotient

From Memory Alpha, the free Star Trek reference

The Duke-Heidelburg quotient was, in the field of 23rd century psychology, a relative means determining the potential in ones abilities of possessing extrasensory perception; especially when used in correlation with the esper rating, aperception quotient, and general knowledge quotient.

According to a readout on Elizabeth Dehner in 2265, she had a Duke-Heidelburg quotient rating of 256. Her ratings were considered "better than average."

Likewise, Gary Mitchell had a Duke-Heidelburg quotient rating of 261. His ratings reached into the next level of "well above average." (TOS: "Where No Man Has Gone Before")

[edit] Background

In real life, the term Duke-Heidelburg quotient appears to be non-existent, so it is unclear its extremes or limitation, or how exactly it relates to ones esper rating. It is unknown who or what Duke and Heidelburg are, but they may be in reference to the universities of Duke and (misspelled) Heidelberg, which are known for their work in psychology. The Duke-Heidelburg quotent may be based on future collaborative findings of the two universities in that field.