Why have there been no aptitude, IQ, test comparing performance of different Blood Types?

Question

Race is a subjective socio-economic construct, based in a mental illness to distract Humans from being Humans. Providing the false concept of Superior and Inferior Humans. The dominant culture has promoted the erroneous concept of various races through many venues, psuedo-science in particular.

All animals to the best of my knowledge have the same colour blood. Fish, lizards, birds, quadrupeds, and Humans have Red Blood. Non oxygenated blood is bluish-red, Oxygenated blood is a Bright red. Human Blood is carbon phyllic, it loves carbon, carbon monoxide, carbon di-oxide, alcohol, etc.

Humans all have the same colour blood, but do not necessarily bleed the same blood. There are 4 basic blood classifications: O, A, B, & AB. There are 2 variations of these types Rh Positive & Rh Negative. Most people are Rh positive in any of the categories.

The four bacic types are not restricted to the socio-economic limitting, primitve designations used for members of the Human family today

Answer 1

There are actually 29 different blood types, though the types you mention are the most famous.

The Nazis attempted to link negative characterists to B blood type (more common in Jews) - this research has been discredited.

Probably there have been no serious (i.e. not motivated by idology) studies of the type you mention because most scientists did not think it likely that blood type would have an impact. Before they perform a study or experiement, they need to have a hunch that blood type could have an impact on something other than immune system details.

At a micro-level, the human body has millions of ways it can be categorized, in addition to blood type. Most of these only have minor impact on macro behavior. That is why scientists choose different areas for research, i.e. areas which are more likely to have a correlation with macro-level things like IQ or apptitude.