that is members of groups of people, that is homo sapiens as voluntarily participating paid participants: utilizing psychological testing it could also be possible to heighten the happiness of the volunteers; it is possible to utilize only 70th percentile or greater of persons at their society's quantified feeling and thinking that they have options, surpluses, and other opportunities:
A person making the reusable psychometric product, likely software, finds people above the 70th percentile of fiscal resources, as well as above the 70the percentile of preferred amount of fiscal flows at that society, and quantifies them psychometrically, then at a different group, the group of people that would like to participate, at that group of people they also find the people at the median quantified feeling or above, of that of the 70th percentile group as to their feeling fiscally of perceiving they are median or above at big 5 psychology test measured mental wellness, they are also screened on if they are at or above the society's median at both intelligence and educational hours experienced; these people perceive they are doing well, do what they offer, can comprehend the purpose, documentation risks and benefits of being a human experimental subject; heightening the happiness of the participants is also possible, a 16 to 40 item optional psychology test is available, the quantifications from they test have an r value of predicting the effect of experiment participation among people replying at various ways on the psychological test, then they get to participate based on their percentile of how much happier they are projected to be, that is, their quantifiable subjective well being, from participating as a human test subject at that actual experiment;

I favor financial compensation to humans that voluntarily participate at scientific studies including medical studies.

Actinomycetes also is modified to be a nutrient source, as well as possibly a habitat for the fungi and bacteria that globally produce longevity heightening drugs that are effective on humans as well as numerous other organisms, that way from the fungi and bacteria living at the actinomycetes that lives at the earthen particles(dirt) the earthen particles continually, at minute amounts, like the amounts reaching leaves of plants at 2019 AD earth, cause the surfaces of plants to have longevity chemical and drug molecule producing bacteria and fungi on them, possibly as entire fungi and bacteria as well as spores, noting the bacteria and fungi are harmless to the plant unless kept wet with unmoving water for 72 hours, noting that rain is moving water, rather than the unmoving water that accumulates bacterial and fungal chemicals various lengths of rain omit causing the fungi and bacteria to digest the plant; the fungi and bacteria grow, activate, and make longevity drugs and chemicals when at unmoving water 72 hours;