data-mackay1992: Grid data from Mackay (1992). Data set 'Grid C'-
Description
used in Mackay's paper on inter-element correlation
(1992, p. 65).
References
Mackay, N. (1992). Identification, reflection,
and correlation: Problems in the bases of repertory
grid measures. International Journal of Personal
Construct Psychology, 5(1), 57-75.