Hi,
I'm working out d' and therefore I'd like to aggregate two variables
at once (hits and false alarms). In the raw data frame is subject,
stimulus_presence, and response information. I aggregate this into a
table now currently by separating out the target_presence=true data
and working out a hit rate and then workout out the false alarm rate
from the target_presence=false data. Then I cbind the "x" column
from the false alarm aggregate to the hit rate data. Then I can also
append a dprime column if I wish. I am just inquiring as to whether
there is some facility I am missing for aggregating the variables
simultaneously or just generating the d' in one step.
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