Reference: Green, D. M., & Swets, J. A. (1966). Signal detection theory and psychophysics. New York: Wiley.

The book "Signal Detection Theory and Psychophysics" by Green and Swets is a classic reference in the field of psychophysics. It provides a comprehensive explanation of signal detection theory, including the computation of d-prime (d') for 2AFC/2IFC designs. It covers various topics related to signal detection theory, including threshold estimation, receiver operating characteristic (ROC) analysis, and the interpretation of d-prime values.

While the book was published in 1966, it remains a widely recognized and influential resource in the field. It may be helpful to consult more recent literature for any advancements or refinements in the computation of d-prime specifically for 2AFC/2IFC designs, as the field of psychophysics has evolved since the book's publication.

Hope it helps:credit AI

Thank you!

Hi Luigi Tamè,

read the attached file.

i hope i helped.

D.S

Hi Dimitrios,

thank you for this. However, what I am not sure is what to count as Hit and FA in the following design. 2 Interval forced choice.

Interval 1: standard stimulus

Interval 2: stimulus can be higher or lower compared to interval 1

Thank you for any advice that you may have

Best,

Luigi