Description Usage Arguments Details Value Note Author(s) References See Also Examples
Align constructs by loadings on first pricipal component.
In case a construct loads negatively on the first principal
component, the function alignByLoadings
will reverse it
so that all constructs have positive loadings on the first
principal component (see deatil section for more).
1 | alignByLoadings(x, trim=20, output=0, digits=1)
|
x |
|
trim |
The number of characters a construct is trimmed to (default is
|
output |
Numeric. The function returns either the |
digits |
Numeric. Number of digits to round to (default is
|
The direction of the constructs in a grid is arbitrary and a reflection of a scale does not affect the information contained in the grid. Nonetheless, the direction of a scale has an effect on inter-element correlations (Mackay, 1992) and on the spatial representation and clustering of the grid (Bell, 2010). Hence, it is desirable to follow a protocol to align constructs that will render unique results. A common approach is to align constructs by pole preference, but this information is not always accessible. Bell (2010) proposed another solution for the problem of construct alignment. As a unique protocol he suggests to align constructs in a way so they all have positive loadings on the first component of a grid PCA.
Aligned repgrid
object for output=0 or 1
or a
list for output=2
.
Bell (2010) proposed a solution for the problem of construct alignment. As construct reversal has an effect on element correlation and thus on any measure that based on element correlation (Mackay, 1992), it is desireable to have a standard method for construct alignment independently from its semantics (preferred pole etc.). Bell (2010) proposes to align constructs in a way so they all have positive loadings on the first component of a grid PCA.
Mark Heckmann
Bell, R. C. (2010). A note on aligning constructs. Personal Construct Theory & Practice, 7, 42-48.
Mackay, N. (1992). Identification, Reflection, and Correlation: Problems in ihe bases of repertory grid measures. International Journal of Personal Construct Psychology, 5(1), 57-75.
1 2 3 4 5 6 7 8 9 10 | ## Not run:
# reproduction of the example in the Bell (2010)
bell2010 # show grid
alignByLoadings(bell2010) # constructs aligned by loadings on PC 1
alignByLoadings(bell2010, output=2) # show results
## End(Not run)
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