There may have been multiple studies so I can't for sure say that the date and Person are wrong but the only study I could find that fits the description was in 1999 by W W Schults, P van Andel, I Sabelis, and E Mooyard.
Schultz, W. W., van Andel, P., Sabelis, I., & Mooyaart, E. (1999)...