We know that animal research may inform our understanding of human behaviour. The rationale for this is that we share the same biological structure and genotype with many animals, so presumably we are quite similar.

How do we establish a “threshold” of similarity though?

To what extent exactly, and in what aspects, should an animal be similar to human beings for us to assume that a study of this animal would inform our understanding of human behaviour?

Was Harlow justied in his selection of research subjects