\(R=\{x: \Lambda(x) \frac{P(H_s)}{P(H_n)} < c\}\)

References

Knoblauch, K., & Maloney, L. T. (2012). Modeling Psychophysical Data in R. New York: Springer.

Maloney, L. T., & Zhang, H. (2010). Decision-theoretic models of visual perception and action. Vision Research, 50(23), 2362–2374.

Wickens, T. D. (2001). Elementary signal detection theory. Oxford University Press.