ResultsMost monkeys didn’t interact with the toys. Only very few interacted frequently and for long. Data of (17) monkeys who showed less than 5 behaviours were excluded.
Results
Male monkeys played with wheeled toys for a longer time than female monkeys.
However, the standard deviation was high, meaning that some males played for longer than others.
Results
Female monkeys played with plush toys for a longer time than male monkeys. There wasn’t a significant difference in time spent playing with wheeled or plush toys.
Results - Male Monkeys
Male monkeys preferred wheeled toys (mean = 9.77), compared to plush toys (mean = 2.06). Males played with plush toys less than females.
73% of males preferred wheeled toys and only 9% preferred plush toys. 18% showed no significant preference. These preferences were not affected by age or rank.
Results - Female Monkeys
Female monkeys showed no preference, other than an insignificant preference for plush toys. Mean plush toys preference = 7.97. Mean wheeled toys preference = 6.96.
Only 30% of females preferred plush toys, whereas 39% preferred wheeled toys, and 30% showed no significant preference.