Final answer:
The excerpts did not specify Betty's actions when she heard people singing Psalms from outside, but she may have listened or joined in singing, reflecting the historical practice of lining out hymns.
Step-by-step explanation:
When Betty heard people singing psalms from outside, there isn't a direct action provided in the text excerpts you've given. However, lining out hymns as described was common in the eighteenth and nineteenth centuries, and suggests a community's active participation in religious singing. One might infer that Betty, being a part of this community or historical context, may have reacted by silently listening or by joining in the singing, albeit the texts mentioned do not specify Betty's actions.