I am not sure where you heard these things, but no a dream can certainly last longer than 12s. Some research suggests that time passes similarly in dreams as it does in real life, but some lucid dreamers are able to slow down or speed up time in their dreams (time dilation) which suggests that this is not a strict law of dream time. I believe during the study the participants were aware of the hypothesis that time would pass at the same rate, and no doubt the expectations and behavior of the dreamers had an effect on the dream. |
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