Sheldrake is a nut
Sheldrake responds that skeptics dampen the morphic field, whereas believers enhance it. Of Wiseman, he remarked: "Perhaps his negative expectations consciously or unconsciously influenced the way he looked at the subjects."
Perhaps, but wouldn't that mean that this claim is ultimately nonfalsifiable? If both positive and negative results are interpreted as supporting a theory, how can we test its validity? Skepticism is the default position because the burden of proof is on the believer, not the skeptic.
Scientific American
It take a bit to wade through all the goofy stuff about him on the WWW, but where there is any scientific evaluation, his hypotheses don't hold up.