In 1937 he became a temporary lecturer in Dundee but the most fruitful work he undertook during this period was as a private assistant to Professor Sir Godfrey Thomson at the University of Edinburgh. Thomson headed the Moray House Group at Edinburgh which was undertaking research into intelligence testing.
Sa 1937 siya ay naging isang pansamantalang lektor sa Dundee ngunit ang pinaka-kapaki-pakinabang trabaho siya undertook panahon na ito ay bilang isang pribadong assistant sa Professor Sir Godfrey Thomson sa Unibersidad ng Edinburgh. Thomson ulo House ang pinangitan Group at Edinburgh na kung saan ay pagsasagawa ng pananaliksik sa katalinuhan pagsubok.