Final answer:
True. Historically, researchers have focused more on the physical outcomes of recreation than the social-psychological outcomes.
Step-by-step explanation:
True. Historically, researchers have indeed focused more on the physical outcomes of recreation rather than the social-psychological outcomes. This can be seen in various studies and research that have emphasized physical health, activity levels, and sports performance as primary outcomes. However, in recent years, there has been a growing recognition of the importance of considering the social-psychological outcomes of recreation, such as mental well-being, social interaction, and personal development.