diag_ratio_W: Diagnosticity Ratio (Wells & Lindsay, 1980; Wells & Turtle,...

In r4lineups: Statistical Inference on Lineup Fairness

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)

r4lineups documentation built on May 2, 2019, 7:10 a.m.