We did see that effect! But, it was pretty minor. In fact, we saw all sorts of effects that would have been impossible to observe in a traditional lab experiment.<p>One other interesting effect we saw was a day-to-day restart effect: just leaving and coming back the next day was enough to raise the amount of cooperation a significant amount. It&#x27;s not detectable at the individual level, but in aggregate it&#x27;s as if going everyone going about their life for a day was enough to instill some new optimism about cooperation at the beginning of a new session than at the end of the day before.<p>Just that last observation returns to the original point that was made: is it even reasonable to draw conclusions about real-life cooperation from these highly clustered, short-term studies in a lab? We&#x27;re trying to show that the &quot;virtual lab&quot; on the Internet is a way to get around these constraints.<p>If you&#x27;re doing research in this area, check out our OSS projects: <a href="https:&#x2F;&#x2F;github.com&#x2F;VirtualLab" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;VirtualLab</a>