Conflict measure as proposed by Bassler et al. (1992).
indexConflict2(x, crit = 0.03)repgrid object.
Sensitivity criterion with which triads are marked as
unbalanced. A bigger values will lead to less imbalanced
triads. The default is 0.03. The value should
be adjusted with regard to the researchers interest.
I am a bit suspicious about step 2 from above. To devide by 3 appears pretty arbitrary.
The r for a z-values of 3 is 0.9950548 and not 1.
The r for 4 is 0.9993293. Hence, why not a value of 4, 5, or 6?
Denoting the value to devide by with a, the relation for the
first case translates into \( a Z_{max} Z_{mdn} <= \frac{crit}{a} + Z_{min} \)
a x Z_max x Z_mdn =< crit/a + Z_min. This shows that a bigger value of a
will make it more improbable that the relation will hold.
The function calculates the conflict measure as devised by Bassler et al.
(1992). It is an improved version of the ideas by Slade and Sheehan (1979)
that have been implemented in the function indexConflict1. The
new approach also takes into account the magnitude of the correlations in a
trait to assess whether it is balanced or imbalanced. As a result, small
correlations that are psychologically meaningless are considered accordingly.
Also, correlations with a small magnitude, i. e. near zero, which may be
positive or negative due to chance alone will no longer distort the measure
(Bassler et al., 1992).
Description of the balance / imbalance assessment:
Order correlations of the triad by absolute magnitude, so that \( r_{max} > r_{mdn} > r_{min} \).
Apply Fisher's Z-transformation and division by 3 to yield values between 1 and -1
Check whether the triad is balanced by assessing if the following relation holds:
If \( Z_{max} Z_{mdn} > 0 \), the triad is balanced if \( Z_{max} Z_{mdn} - Z_{min} <= crit \) Z_max x Z_mdn - Z_min <= crit .
If \( Z_{max} Z_{mdn} < 0 \), the triad is balanced if \( Z_{min} - Z_{max} Z_{mdn} <= crit \) Z_min - Z_max x Z_mdn <= crit .
Bassler, M., Krauthauser, H., & Hoffmann, S. O. (1992). A new approach to the identification of cognitive conflicts in the repertory grid: An illustrative case study. Journal of Constructivist Psychology, 5(1), 95-111.
Slade, P. D., & Sheehan, M. J. (1979). The measurement of 'conflict' in repertory grids. British Journal of Psychology, 70(4), 519-524.
See indexConflict1 for the older version
of this measure; see indexConflict3
for a measure based on distances instead of correlations.
if (FALSE) {
indexConflict2(bell2010)
x <- indexConflict2(bell2010)
print(x)
# show conflictive triads
print(x, output = 2)
# accessing the calculations for further use
x$total
x$imbalanced
x$prop.balanced
x$prop.imbalanced
x$triads.imbalanced
}
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