| TRDemo {TaylorRussell} | R Documentation |
A 'shiny' Taylor-Russell demonstration program
Description
TRDemo() is an R 'shiny' function for illustrating the bivariate
(i.e., single predictor) Taylor-Russell model for
personnel selection. The function can be called
from the command prompt (>) by typing:
TRDemo()
After calling the function, users are asked to enter values for 3 of the following 4 variables:
The Base Rate (BR) of successful criterion performance (i.e., within the target population, the proportion of individuals who successfully execute the job demands).
The Selection Ratio (SR; i.e., the proportion of hired candidates within the target population).
The Criterion Validity (CV; the correlation between the selection test and an operationalized measure of job performance).
The Positive Predicted Value (PPV; The probability that a hired individual can successfully execute the job demands).
Usage
TRDemo()
Details
TRDemo() is a 'shiny' program for demonstrating the
classic Taylor-Russell model for personnel selection.
TRDemo() calculates the model-implied value for the omitted
variable and prints all model parameters (e.g., BR, SR,
CV, and PPV) to
screen. Given these parameters, the function also reports the test Sensitivity
(defined as the probability that a qualified individual will be hired) and
test Specificity (defined as the probability that an unqualified individual
will not be hired). Finally, the function plots a
correlation ellipse (associated with the CV) showing the relative
proportions of True Positives (TP; hired individuals who are
qualified for the job), False Positives (FP; hired individuals who are not
qualified for the job), True Negatives (TN; non hired individuals who are
not qualified for the job), and
False Negatives (FN; non hired individuals who are qualified for the job).
Value
No return value.
Author(s)
Niels G. Waller (nwaller@umn.edu)
Ziyu Ren
References
Taylor, H. C. & Russell, J. (1939). The relationship of validity coefficients to the practical effectiveness of tests in selection: Discussion and tables. Journal of Applied Psychology, 23, 565–578.
Examples
# Type TRDemo() from the command prompt (>) to run the 'shiny' app
# in interactive mode.