[Mamzelle]

re: A total of 237 undergraduate students (80 men and 157 women aged 16 to 25 years), from the psychology department at a state university in the northeast of the US, completed questionnaires measuring personality traits and life goals.)))

...from the psychology department...

[johniegrad]

...from the psychology department...

Exactly. This is a biased sample to begin with chosen to provide the results the researchers intended when they set up their "study".