In four experiments, we tested the hypothesis that spending
time on others increases individuals’ perceived time, in terms
of the amount of spare time they currently have (Kasser &
Sheldon, 2009; Zauberman & Lynch, 2005) as well as the
expansiveness of their future (Lang & Carstensen, 2002). We
compared giving time with other activities that could affect
time affluence—wasting time (Experiment 1a), spending time
on oneself (Experiments 1b and 3), and getting time (Experi-
ment 2)—and tested for the underlying role of self-efficacy
(Experiment 3).