What does Determination really do?

[Barraind]

They should probably just state the multipliers the stats do in the character menu. Otherwise, you'd have to rely on parsers to figure that out, and risk the "PaRsErS aRe ToXiC" crowd coming after you.

To be nitpicky, data mining. I dont disagree though.

Theres no attainable values of any secondary stat that would allow you to accurately parse the stat to each breakpoint, especially since it uses breakpoints and not a linear or exponential scale. Every single breakpoint is within a fraction of an allowable deviation of both the previous and the following breakpoints.