Dichotomizing is also called dummy coding. It means: Take a variable with multiple different values (>2), and transform it so that the output variable has 2 different values. Note that this “thing” can be understood as consisting of two different aspects: Recoding and cutting. Recoding means that value “a” becomes values “b” etc. Cutting means that a “rope” of numbers is cut into several shorter “ropes” (that’s why it is called …