Yes.
But it doesn’t mention local anomalies or deviation.
See.. Now that you have noted a flaw in the study you can apply for a grant to continue and correct the research. Johnny will be co-researcher (for a suitable distribution of the grant) and bring his degaussing coil to aid in the production of local anomalies under more controlled conditions..
I'll donate the use of the seventy some acres out behind the barn for your research field.. Of course utilization of the seventy some acres behind the barn will require certain enhancements to the property to make it more suitable as a research site.
But I'm sure the grant will cover that..