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INGRID is the name by which Patrick Slater’s programme to analyse the data of a repertory grid is best known. It was originally published as "Grid Analysis II" in Slater (1964). [Presumably there was an unpublished Grid Analysis I.] Technically, the analysis is a singular-value-decomposition of construct centred grid data. The best account of it can be found in Slater (1977). The general use of the grid in Britain may have been largely due to the availability of an MRC funded "scoring service" provided by Patrick Slater at the Institute of Psychiatry. Slater (1976) reported that by 1973 the service was processing 10,000 grids per year. From that time the MRC directed the programme be distributed to various computer centres. It was somewhat slower to be adapted for microcomputers due to the relatively complex analysis involved which was written in the then mainframe computer language FORTRAN, although it eventually appeared in various guises in a number of PC computer programmes. Currently it is available as an automatic choice in several Windows based programmes (listed below), although it can also be carried out in other programmes such as GRIDSTAT.

  • Slater, P. (1964) The Principal Components of a Repertory Grid. London; Vincent Andrews.
  • Slater, P. (1976) The measurement of intrapersonal space by grid technique. Volume 1 Explorations of intrapersonal space. London: Wiley
  • Slater, P. (1977) The measurement of intrapersonal space by grid technique. Volume 2 Dimensions of intrapersonal space. London: Wiley.

Richard C. Bell

Establ. 2003
Last update: 15 February 2004