Calculate 'variability' of a grid as defined by Slater (1977).

Variability records a tendency for the responses to gravitate towards both end of the gradings scale. (Slater, 1977, p.88).

Usage

indexVariability(x, min = NULL, max = NULL, digits = 2)

Arguments

x

repgrid object.

min, max

Minimum and maximum grid scale values. Nor needed if they are set for the grid.

digits

Numeric. Number of digits to round to (default is 2).

Value

Numeric.

Note

STATUS: working and checked against example in Slater, 1977 , p.88.

References

Slater, P. (1977). The measurement of intrapersonal space by Grid technique. London: Wiley.

See also

indexBias()

Examples

indexVariability(boeker)
#>  max 
#> 0.51