Campbell, D.E. 1979.  Interior office design and visitor response. J. Applied Psychology 64(6):648-653.
An experiment was conducted to determine the impact of environmental variables found in faculty offices on students. The subjects of the experiment were two hundred fifty one undergraduate students. Each was asked to rate photographic slides of a faculty office that differed in neatness, furniture arrangement, and the presence of living things and aesthetic objects. Positive ratings were given to the slides depicting an office with posters and plants, negative ratings were given to slides depicting a cluttered office, and the arrangement of furniture had relatively little impact. It was also determined that females were more influenced by the manipulation of the environment than males.