| diag_ratio_W {r4lineups} | R Documentation |
Diagnosticity Ratio (Wells & Lindsay, 1980; Wells & Turtle, 1986)
Description
Computes Wells' diagnosticity ratio for one lineup pair
Usage
diag_ratio_W(lineup_pres, lineup_abs, pos_pres, pos_abs, k1, k2)
Arguments
lineup_pres |
A numeric vector of lineup choices for a lineup in which the target was present |
lineup_abs |
A numeric vector of lineup choices for a lineup in which the target was absent |
pos_pres |
A scalar, representing target position in TP lineup. Must be declared by user |
pos_abs |
A scalar, representing target position in TA lineup. Must be declared by user |
k1 |
Number of targets in TP lineup. Must be specified by user (scalar). |
k2 |
Number of targets in TA lineup. Must be specified by user (scalar). |
References
Wells, G. L., & Lindsay, R. C. L. (1980).On estimating the diagnosticity of eyewitness nonidentifications.Psychological Bulletin, 88, 776-784.
Wells, G. L., & Turtle, J. W. (1986). Eyewitness identification: The importance of lineup models. Psychological Bulletin, 99, 320-329.
Examples
#Data:
lineup_pres <- round(runif(100, 1, 6))
lineup_abs <- round(runif(70, 1, 5))
pos_pres <- 3
pos_abs <- 5
#Call:
diag_ratio_W(lineup_pres, lineup_abs, pos_pres, pos_abs, 6, 5)
diag_ratio_W(lineup_pres, lineup_abs, 3, 5, 6, 5)