1) Im calculating Cohen's Effect Size for 2 groups. Its not an intervention study, hence there's no control group per say. Im just comparing the measured characteristics of the 2 groups. Hence, in this case, does it matter which is the "experiemental" or "control group" ? Changing the order will determine if the effect size is positive or negative.

2) In the situation of a negative Cohen's Effect Size, how do i interpret it? Since <0.2 = trivial, does that mean all negative findings = trivial effect size then?

Thanks in advance !