He was involved with a project called the Colchester survey which aimed to discover whether inherited factors or environmental factors were the most significant in determining if someone would be likely to suffer from mental heath problems.
Siya ay kasangkot sa isang proyekto na tinatawag na ang Colchester survey na naglalayong tuklasin kung minana kadahilanan o environmental factors ay ang pinaka-makabuluhan sa pagtukoy kung ang isang tao ay malamang na magtiis sa mental sukalan problema.